DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80

R.L.Robinson; A.V.Ramayya

Chinese Physics C> 1979, Vol. 3> Issue(3) : 355-381

DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80

Abstract
HTML
Reference
Related

PDF

Abstract：
Recent studies of levels in even-even ^68,70,72Ge,^70,72,74Se,^74,76,78,80Kr and ⁶⁵Ga and ⁷⁴Br have led to the discovery of a wide variety of different collective band structures.These include bands built on near spherical ground states and excited more well de-formed shapes that may include triaxial shapes,rotation-aligned bands built on thesame orbital （g_（9/2））² for both protons and neutrons,RAL negative parity bands witheven and odd spins,and ΔI=1 γ-type vibrational bands in even-even nuclei.As recent as 1974,a survey of the energy level in the even-even Ge and Se iso-topes^[1] revealed little was known above a spin of 4⁺ （see for examples Figs.1 and 2 of Ref.1）.With the exception of the unusally low-lying excited 0⁺ states in ^70,72Ge,first discovered in ⁷²Ge in 1948 at Vanderbilt^[2],the theoretical treatment of thesenuclei was limited primarily to some variation of the vibrational model.However,very recently there has been a surge of information on nuclei in this region that hasrevealed fascinating new features and also provided new insight into the excited 0^+’states.Particularly striking are the multiple,independent and highly collective bandstructures which we have discovered in our in-beam γ-ray spectroscopy studies fol-lowing heavy-ion induced reaction.Evidence for and the theoretical understandingof the richness of the collective band structures that are found in our studies of^68,70,72Ge （Refs.3—6）,^70,72,74Se （Refs.7—13） and ^74,76,78,80Kr （Refs.14—18）,as illustratedby the at least seven different bands found in our studies of the levels of ⁶⁸Ge ⁷⁴Se,and ⁷⁶Kr （Figs.1—3）,are described in this paper.These multiple structures includethe following:a) coexistence of ground bands built on near-spherical shapes andexcited bands with larger deformation built on O^+′ band heads;b) bands with 8⁺band heads interpreted as rotation-aligned,RAL,bands built on both neutron and/orproton （g_（9/2））² quasiparticle configurations coexisting with the ground-state band;c)RAL neutron and proton odd-parity bands formed from coupling of a g_（9/2 _）quasipar-ticle and a p_（1/2）,p_（3/2） or f_（5/2）,quasiparticle with the core;d) ΔI=1 even-parity bands,which are best characterized as gamma-vibrational bands;and e) additional bandswhose nature are presently not known.

References

[1]

A. V. Ramayya and J. H. Hamilton, Proc. international Conf. on Gamma Ray Transition Probabilities, eds. S. C. Pancholi and S. L Gupta. U. Delhi Press (1977), P. 123.[2] S. K. Haynes. Phys. Rev., 73(1948). 187; 74 (1948), 423.[3] A. de Lima, B. van Nooijen. R. M. Ronningen, H. Kawakami, J. H. Hamilton. A. V. Ramay-ya, R. B. Piereey, R. L. Robinson. H. J. Kim and W. K. Tuttle, Selected Topies in Nuelear Strueture, ed., V. G. Soloviev et al., Dubna, USSR. Vol. 1 (1976), 194.[4] A. de Lima, J. H. Hamilton, A. V. Ramayya, B. van Nooijen, R. M. Ronningen. H. Hawa-kami, R. B. Piercey, R. L. Robinson, H. J. Kim, W. K. Tuttle and L. K. Peker. Int. Conf. on Nucl. Phys., Contributed Papers, Tokyo (1977), 276.[5] R. L. Robinson, H. J. Kim, R. O. Sayer, J. C. Wells, R. M. Ronningen and J. H. Hamilton, Phys. Rev., C16 (1977),2268.[6] A. C. Rester, A. P. do Lima, J. H. Hamilton, A. V. Ramayya, H, Kawakami, E. de Limn, R. M. Ronningen, R. L. Robinson and H. J. Kim, Contributed papers, Int. Conf. on Nucl. Structure, Tokyo (1977), 281,[7] A. V. Ramyya, J. H. Hamilton, R. L. Robinson, H. Hawakami, R. B. Fiercey, C. F. Maguire, W. T. Pinkston, A. P. de Lima, D. L. Sastry, H. J. Kim, J. C. Wells and A. C. Rester, Contri-buted Papers; Int. Conf. on Nucl. Structure, Tokyo (1877), 280.[8] J. H, Hamilton, A. V. Ramayya, W. T. Pinkston, R. M. Ronningen, G. Garcia-Bermudez. H. K. Carter, R. L. Robinson, H. J, Kim and R. O. Sayer, Phys. Rev. Lett., 32 (1974), 239.[9] J. H. Hamilton, H. L. Crowell. H. L. Robinson, A. V. Ramayya, W. E. Collins, R. M. Ron-ningen, V. Maruhn-Rezwani, J. A. Maruhn, N. C. Singhal, H. J. Kim, R. O. Sayer, T. Magee and L. C. Whitlock, Phys. Rev. Lett., 36 (1976), 340.[10] A. V. Ramayya, R. M, Ronningen, J. H. Hamilton, W. T. Pinkston, G. Careia-Bermudez. R. L. Robinson, H. J. Kim, H. K. Carter and W. E. Collins, Phys. Rev., C12 (1975), 1360.[11] R. M. Ronningen, A. V. Ramayya. J. H. Hamilton, W. Lourens, J. Lange, H, K. Carter and R. O. Bayer, Nucl. Phys., A261 (1976), 439.[12] R. B. Piercey, A. V. Ramayya. R. M. Ronningen, J. H. Hamilton, R. L. Robinson and H. J. Kim, Phys, Rev. Lett., 37 (1976), 496.[13] R B. Piercey, Ph. D. Thesis, Vanderbilt University (1917) and R. B. Piercey R. M. Ronningen, J. H. Hamilton, V. Maruhn-Rezwanl, R. L. Robinson and H. J. Kim, to be published in Phys. Rev.[14] R. Soundranayagam, R. B. Piercey, J. H. Hamilton, A. V. Ramayya, C. F. Maguire, R. L. Ro-binson and H. J. Kim, Bull. Southeastern Section Am. Phys. Soc. Meeting 45 (1978), 20.[15] R .B. Piercey, A. V. Ramayya, J, H. Hamilton, C. F. Maguire, R. L. Hobinson and J. C. Wells, contribution to the Int. Conference in Canberra (1978).[16] R. L. Robinson, H. J, Kim, R. O. Sayer, R. B. Piercey, A. V. Ramayya, J. H. Hamilton and J. C. Wells, Bull. Am, Phys. Soc. 22 (1977), 1027. and contribution to the International Conference in Canberra (1978).[17] D, L, Sastry, A. Ahmed, A. V. Ramayya, R. L. Robinson, R. B. Piercey, J. H. Hamilton, C. F. Maguire, H. Kawakami, A. P, de Lima, H. J. Kim and J. C. Wells, Contributed Paper, Int. Conf. on, Nucl, Structure. Tokyo (1977), 301.[18] R. B. Piercey, A. V. Ramayya, J. H. Hamilton, R. L. Robinson, L. K. Peker, D. L. Sastry, A. Ahmed, H. Kawakami, A. P. de Lima. H. L. Crowell, H. J. Kim, R. O. Sayer and J. C. Wells, contribution, Int. Conf., Canberra (1978).[19] M. A, Mariscotti, G. Scharff-Goldhaber and B. Buck, Phys. Rev., 178 (1969), 1864.[20] G, F. Neal, Z. P. Sawa, F. P. Venezia and P. R. Ghagnon, Nucl. Phys., A280 (1977), 161.[21] C. Morand, M. Agard, J. F. Bruandet, A. Giorni, J. P. Longequeue and T. V. Chang, Phys. Rev., C13 (1976), 2182.[22] L. Funke, J. Dring, F. Dubbers, P. Kemnitz, H. Strusny, E. Will, G. Winter, V. G. Kiptiliy, M. F. Kudojarov, I. Kh. Lemberg, A. A. Pasternak and A. S. Mishin, Annual Report, Zentralinstitute f. Kernfrschung, Rossendorf, and Int. Symposium on High Spin Phenomena and Nucl. Structure, ed. L. Funkc, Acad. of Science DDR, Rossendorf ZfK-336, Dresden (2977), 14.[23] J. F. Brouandet, B. Berther, C. Morand, A. Giorni, J, P. Longequeue and T. V. Chang, Phys. Rev., C14 (1976), 103.[24] D. G. McCauley and J. E. Draper, Phys. Rev., C4 (1971), 475.[25] H. P. Hellmeistcr, J. Keinover, K. P. Lieb, R. Rascher, R. Ballini, J. Delaunoy and H. Du-mont, contribution to the International Conf. in Canberra (1978).[26] L. K. Peker and J. H. Hamilton, Int, Conf. on Nucl. Structure, Contributed Papers, Tokyo (1977), 110.[27] A, Bohr and B. R. Mottelson, Supp. J. Phys. Soc. Japan 44 (1978), 157.[28] L. K. Peker, J. O. Rasmussen and J. H. Hamilton, submitted to Phys. Rev. Letters.[29] J. H. Hamilton, Proc. Int. Conf. on Selected Topics in Nucl. Structure, eds. V, G. Soloviev, et al., Dubna, USSR (1976), Vol. II, 303.[30] F. S. Stephens and R. S. Simon, Nucl. Phys., A183 (1972), 257.[31] C. Flaum and D. Cline, Phys. Rev., 14 (1976), 1224,[32] A. P, de Lima et a1., contribution to the Int. Conf, in Canberra (1978).[33] E. Nolte, Y. Shida, W, Kutschera, P. Prestele and H. Morinaga, Z. Phys. 268 (1974), 267.(34] I. Kh. Lemberg et al., Proc. Nucl. Structure Conf., Soviet Acad. of Science, Leningrad (1975), p. 379.[35] L. K. Peker, Proc. Winter School for Nucl. Theory and High Energy Phys., Leningrad, USSR (1974), 334 and (1975).[36] A, Faessler, M. Ploszajczak and K. R. Sandhya Devi, Int. Symp. on. High Spin States and Nucl. Structures, ed., L. Funke, Akademic Der Wisserschafter Der DDR, ZfK-336, 1977, p. 68 and to be published; and A. Faessler et al., Nucl. Phys.. A286 (1977), 101.[37] C. Flaum, D. Cline, A. W. Sunyar and O. C. Kistner, Phys. Rev. Lett., 33 (1974), 973; C. Flaum et al., Nucl. Phys, A264 (1976), 291.[38] J. A. Grau, L. E. Samuelson, F. A. RiekeY, P. C. Simms and G. J. Smith, Phys. Rev., C14 (1676), 2297.[39] B. Reehal and R. Sorensen, Phys. Rev., C2 (1970), 819.[40] C. Merand, J. F. Bruandet, A. Giorni and T. V. Chang, J. Phys. 38 (1977), 1319.[41] V. G. Kiptiliy, M. F. Kudojarov, A. S. Mishin, I. Kh. Lemberg, A. A. Pasternak, Int. Symp. on. High Spin States and Nucl. Struclure, ed.; L. Funke, Academy of Science, Central Institute for Nuelear Research, Rossendorf, Dresden (1977), 12.[42] K. P. Lieb and J. J. Kolata. Phys. Rev, C15 (1977), 939.[43] D, Ward, Int. Conf on Reactions Between Complex Nuolei, eds., R. L., Robinson et al., Nashville, VoI. II (1974), 417.[44] V, S. Zvonov and V. E. Mitoahin, Int. Symp. on High Spin Phenomena and Nucl. Structure, ed., L. Funke, ZfK-336, Rossendorf, Dresden. (1977), 1.[45] G. Gnenss and W. Greiner, Nucl. Phys., A171 (1971), 449.[46] K. Kumar, R. Remaud, P. Aguer, J. S. Vaagen, A. C. Rester, R. Foucher and J. H, Hamil-ton, Phys. Rev., C16 (1977), 1235.[47] K. Kumar, private communication to be published.[48] W. Greiner, private communication of earlier work, International Conference, Canberra (I978)[49] D. Ardouin, R. Tamisier, M. Vergnes, G. Rotbard, J. Kalifa, G. Berrier and B. Grammaticos. Phys. Rev., C12 (1975), 1745.[50] M. Vergnes, Lectures at 16th Summer School Zakopane, private communication.[51] S. E. Larsson, G. Leander, I. Ragnarsson and G. Alenius, Nucl. Phys., A261 (1976). 77.[52] A. C. Rester, J. B. Ball and R. Auble. Contributed Paper, Int. Conf. on Nucl. Structure, Tokyo (1977), 287.[53] F. Guibault, D. Ardouin, J. Uzureau, P. Avignon, R. Tamisier, G. Rotbard, M. Vergnes. Y. Deschamps, G. Berrier and R. Seltz, Phys. Rev., C16 (1977), 1840.[54] M. N. Vergnes, G. Rotbard, F. Guilbaut, D. Ardouin, C. Lebrun, E. R. Flynn, D. L. Hans and S. D. Orbesen, Phys. Lett., 72B (1978), 447.[55] F. R. May, V. V. Pashkevick and S. Frauendorf, Int. Symp. High Spin Sate and Nucl. Structure, ed. L. Funke, ZfK-36, Rossendorf, Dresden. (1977), p, 7 and JINR report E4-10700, Dubna, 1977[56] For examole, V . Paar, Problems in, Vibrational Nuclei, eds., G. Alaga, V. Paar and L. Sips, North-Holland Publ. Co., Amsterdam (1975), 15.[57] L. A. Peker, J. H, Hamilton, A. V. Ramayya, R. B. Piercey and R. L. Robinson, Int. Conf. on Nucl. Physics, Contributed Papers, Tokyo (1977), 289.[58] A. Arima. and F. Iachello, Phys. Letters, 57B (1975), 39.[59] N. Yoskikawa, Colloque France-Japanais and INS Symposium, INS, Tokyo (1978), 336.[60] M Sakai, Nucl. Phys., A104 (1967). 301.[61] M Sakai, Nucl. Data Tables A8 (1970), 323; 10 (1972), 511.[62] L. L. Collins, L. L. Riedinger, A. C. Kahler, C. R, Gingham, G. D. O'Kelley, J. L. Wood. R. W. Fink, A. G. Sehmidt, E. H. Spejewski, H. K. Carter, R. L. Mlekodaj, E. F. Zganjar and J. H. Hamilton, Phys. Rev., to be published.[63] L. L. Riedinger, A. C. Kahler, L. L. Collins, and G. D. O'Kelley, Phys. Rev., to be published.[64] J. Meyer ter Vehn, F. S. Stephens and R. M. Diamond, Phys. Rev. Lett. 32 (1974), 1383.[65] H. Dawakami, A. P. de Lima, J. H. Hamilton, R. M. Ronningen, A. V. Ramayya, R. L. Ro-binson, H. J. Kim and L. K. Peker, International Conference ore Nuclear Structure, Contri-buted Papers, Tokyo (1377). 274.[66] H. B. Piercey, J. H. Hamilton, R. M. Ronningen, A. V. Ramayya, R. L. Robinson and H. J Kim, Bull, Am. Phys. Soc., 22 (1977), 488 and to be published.

[1]	ZOU Wen-Hua , TIAN Yuan , SHEN Shui-Fa , GU Jian-Zhong , PENG Bang-Bao , ZHANG Di-Da , MA Zhong-Yu . Nuclear structure around ⁸⁰Zr. Chinese Physics C, 2010, 34(1): 56-61. doi: 10.1088/1674-1137/34/1/010
[2]	ZHOU Wen-Ping , ZHAO Yan-Xin , ZHAO Guang-Yi , MA Ying-Jun , LU Jing-Bin , WANG Shou-Yu , SUN Liang , YANG Dong , LI Xian-Feng , MA Chun-Hui , LIU Yun-Zuo , ZHU Li-Hua , WU Xiao-Gu , , , . New Band Structures and Electromagnetic Properties in ¹⁵⁸Tm. Chinese Physics C, 2006, 30(S2): 151-153.
[3]	ZHU Sheng-Jiang , LI Ming-Liang , CHE Xing-Lai , XIAO Shu-Dong , CHEN Yong-Jing , YU Ying-Nan , DING Hui-Bo , XU Qiang , ZHU Li-Hua , WEN Shu-Xian , WU Xiao-Guang , LI Guang-Sheng , . Collective Band Structures of the Nuclei near N=82 Closed Shell in A=135 Region. Chinese Physics C, 2006, 30(S2): 141-145.
[4]	SHEN Shui-Fa , WANG Feng-Ge , PENG Nie , CHEN Heng-Gui , LU Hao , WU Yong-Peng . Signature Inversion in the Odd-Odd Nuclei with Mass A～80. Chinese Physics C, 2006, 30(12): 1234-1237.
[5]	CHE Xing-Lai , ZHU Sheng-Jiang , CHEN Yong-Jing , DING Huai-Bo , LI Ming-Liang . High Spin Band Structure in ¹¹²Ru. Chinese Physics C, 2006, 30(S2): 154-156.
[6]	SHEN Cai-Wan , CHEN Yong-Shou , TU Ya , YU Shao-Ying , ZHANG Da-Li . Prediction and Formation Mechanism of Triaxial Superdeformed Nuclei for A～80. Chinese Physics C, 2005, 29(9): 875-880.
[7]	ZHU Sheng-Jiang , XIAO Shu-Dong , CHE Xing-Lai , YU Ying-Nan , LI Ming-Liang , CHEN Yong-Jing , ZHU Li-Hua , WEN Shu-Xian , WU Xiao-Guang , LI Guang-Sheng . Collective Dand Structures in Doubly Odd ¹³⁶La Nucleus. Chinese Physics C, 2005, 29(11): 1047-1051.
[8]	Falih H , LI Yan-Song , LONG Gui-Lu . Isospin and Mixed Symmetry Excitations in ^60—66Zn Isotopes. Chinese Physics C, 2004, 28(4): 370-376.
[9]	CHE Xing-Lai , ZHU Sheng-Jiang , LI Ming-Liang , YU Yong-Nan . Identification of Collective Bands in Neutron-Rich ¹⁰⁸Ru Nucleus. Chinese Physics C, 2004, 28(S1): 56-58.
[10]	SHEN Shui-Fa , GU Jia-Hui , SHEN Wen-Qing . Calculation of Yrast Bands for Odd-Odd Nuclei ^80,82Rb in A≈80 Mass Region. Chinese Physics C, 2004, 28(3): 274-279.
[11]	ZHANG Zheng , ZHU Sheng-Jiang , XU Rui-Qing , JIANG Zhuo , XIAO Shu-Dong . Identification of Collective Bands in Neutron-Rich ¹¹³Ru Nucleus. Chinese Physics C, 2003, 27(8): 688-691.
[12]	HE Chuang-Ye , WEN Shu-Xian , ZHU Li-Hua , WANG Zhi-Min , LI Guang-Sheng , MA Rui-Gang , WU Xiao-Guang , YUAN Guan-Jun , YANG Chun-Xiang , WANG Yue , ZHANG Zhen-Long , MENG Rui , , , . Signature Splitting and Inversion and Back Bending in Negative Sideband in ⁸⁰Rb. Chinese Physics C, 2003, 27(9): 784-788.
[13]	ZHU Sheng-Jiang , XU Rui-Qing , ZHANG Zheng , JIANG Zhuo , GAN Cui-Yun . Collective Bands in Neutron-Rich ¹⁰⁷Ru Nucleus. Chinese Physics C, 2002, 26(8): 791-796.
[14]	LIU Zhong . A Test Experiment for the Study of Excited States in Z≈56, N≈80 Nuclei Via Deep Inelastic Reactions. Chinese Physics C, 2001, 25(9): 845-849.
[15]	WANG Zhen-Xia , WANG Wen-Min , RUAN Mei-Ling . Formation of Boron Nitride Nanostructures by Means of 60keV N2+ Ion Beam Bombardment. Chinese Physics C, 2001, 25(2): 174-178.
[16]	JIN YunFan , YANG Ru , LIU ChangLong , YAO JiangHong . Irradiation Effect in C₆₀ Films Induced By Low Energy Ions. Chinese Physics C, 2000, 24(1): 82-86.
[17]	ZHU ShengJiang , GAN CuiYun , ZHU LingYan , YANG LiMing , XU RuiQing , JON MyonGil , JIANG Zhuo , ZHANG Zheng , . Collective Band Structures in Neutron-Rich Odd-A ^145,147Ce Nuclei. Chinese Physics C, 2000, 24(11): 1018-1023.
[18]	Zhang Jingye . Some Collective Observables in Nuclear Motion. Chinese Physics C, 1994, 18(12): 1119-1123.
[19]	WANG Yong-Chang , REN Zhong-Liang , YUAN Jun-Qian , YANG Jing-Kang , XIANG Si-Cang . THE CROSS SECTION MEASUREMENT FOR THE ⁶⁰Ni(n,p)⁶⁰Co REACTION. Chinese Physics C, 1990, 14(10): 923-926.
[20]	ZHANG Jing-Ye , Zhong Ji-Quan , LI Bao-An . THE PROTON AND NEUTRON SUBSHELLS AND THE INTERPLAY BETWEEN THEM (Ⅰ)——A≈80—100 REGION. Chinese Physics C, 1985, 9(6): 736-741.

Access

Get Citation

R.L.Robinson and A.V.Ramayya. DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80[J]. Chinese Physics C, 1979, 3(3): 355-381.

R.L.Robinson and A.V.Ramayya. DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80[J]. Chinese Physics C, 1979, 3(3): 355-381. shu

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

Received: 1979-01-04
Revised: 1900-01-01

Article Metric

Article Views(2092)
PDF Downloads(257)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, [email protected]

1.
沈阳化工大学材料科学与工程学院沈阳 110142

DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, [email protected]

Email This Article

DISCOVERY OF MULTIPLE,COLLECTIVE BAND STRUCTURES IN NUCLEI WITH A=60—80

HTML

目录