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

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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.

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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

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

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