Collective Band Structures and Identification of One-Phonon and Two-Phonon γ-Vibrational Bands in 109Tc
GU Long1, ZHU Sheng-Jiang1,2, J. H. Hamilton2, A. V. Ramayya2, J. K. Hwang2, S. H. Liu2, WANG Jian-Guo1, Y. X. Luo2,3, J. O. Rasmussen3, I. Y. Lee3, XU Qiang1, E. Y. Yeoh1, W. C. Ma4
1Department of Physics, Tsinghua University, Beijing 100084 2Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 USA 3Lawrence Berkeley National Laboratory, Berkeley, California 94720 USA 4Department of Physics, Mississippi State University, Mississippi State, MS 39762, USA
Collective Band Structures and Identification of One-Phonon and Two-Phonon γ-Vibrational Bands in 109Tc
GU Long1, ZHU Sheng-Jiang1,2, J. H. Hamilton2, A. V. Ramayya2, J. K. Hwang2, S. H. Liu2, WANG Jian-Guo1, Y. X. Luo2,3, J. O. Rasmussen3, I. Y. Lee3, XU Qiang1, E. Y. Yeoh1, W. C. Ma4
1Department of Physics, Tsinghua University, Beijing 100084 2Department of Physics, Vanderbilt University, Nashville, Tennessee 37235 USA 3Lawrence Berkeley National Laboratory, Berkeley, California 94720 USA 4Department of Physics, Mississippi State University, Mississippi State, MS 39762, USA
The high spin states of the neutron-rich 109Tc nucleus are reinvestigated by observing prompt γ-rays from the spontaneous fission of 252Cf. The previously known yrast band based on the 7/2+ state is updated. A side band built on the 11/2+ state is expanded and a new band based on the 15/2+ state is identified. Band crossing in the yrast band occurs around ≈0.36 MeV. This band crossing is associated with the alignment of two h11/2 neutrons according to the cranked shell model calculations. The band based on the 11/2+ state is proposed as a candidate for the one-phonon γ-vibrational band, and the band built on the 15/2+ state is proposed as a candidate for the two-phonon γ-vibrational band. Other characteristics for the observed bands are discussed.
The high spin states of the neutron-rich 109Tc nucleus are reinvestigated by observing prompt γ-rays from the spontaneous fission of 252Cf. The previously known yrast band based on the 7/2+ state is updated. A side band built on the 11/2+ state is expanded and a new band based on the 15/2+ state is identified. Band crossing in the yrast band occurs around ≈0.36 MeV. This band crossing is associated with the alignment of two h11/2 neutrons according to the cranked shell model calculations. The band based on the 11/2+ state is proposed as a candidate for the one-phonon γ-vibrational band, and the band built on the 15/2+ state is proposed as a candidate for the two-phonon γ-vibrational band. Other characteristics for the observed bands are discussed.
GU Long;ZHU Sheng-Jiang;J. H. Hamilton;A. V. Ramayya;J. K. Hwang;S. H. Liu;WANG Jian-Guo;Y. X. Luo;J. O. Rasmussen;I. Y. Lee;XU Qiang;E. Y. Yeoh;W. C. Ma. Collective Band Structures and Identification of One-Phonon and Two-Phonon γ-Vibrational Bands in 109Tc[J]. 中国物理快报, 2010, 27(6): 62501-062501.
GU Long, ZHU Sheng-Jiang, J. H. Hamilton, A. V. Ramayya, J. K. Hwang, S. H. Liu, WANG Jian-Guo, Y. X. Luo, J. O. Rasmussen, I. Y. Lee, XU Qiang, E. Y. Yeoh, W. C. Ma. Collective Band Structures and Identification of One-Phonon and Two-Phonon γ-Vibrational Bands in 109Tc. Chin. Phys. Lett., 2010, 27(6): 62501-062501.
[1] Hamilton J H et al 1995 Prog. Part. Nucl. Phys. 35 635 [2] Guessous A et al 1995 Phys. Rev. Lett. 75 2280 [3] Guessous A et al 1996 Phys. Rev. C 53 1191 [4] Hua H et al 2004 Phys. Rev. C 69 014317 [5] Yang L M et al 2001 Chin. Phys. Lett. 18 24 [6] Xu R Q et al 2002 Chin. Phys. Lett. 19 180 [7] Ding H B et al 2007 Chin. Phys. Lett. 24 1517 [8] Che X L et al 2004 Chin. Phys. Lett. 21 1904 [9] Che X L et al 2006 Chin. Phys. Lett. 23 328 [10] Ding H B et al 2006 Phys. Rev. C 74 054301 [11] Wang J G et al 2009 Phys. Lett. B675 420 [12] Gu L et al 2009 Chin. Phys. Lett. 26 092502 [13] Hwang J K et al 1998 Phys. Rev. C 57 2250 [14] Luo Y X et al 2004 Phys. Rev. C 70 044310 [15] Radford D C 1995 Nucl. Instrum. Methods Phys. Res. A 361 297 [16] Xu F R et al 2004 Phys. Rev. C 65 021303(R) [17] Xu F R et al 2001 Chin. Phys. Lett. 18 750 [18] Satula W et al 1994 Nucl. Phys. A578 45 [19] Bohr A and Mottelson B R 1975 Nuclear Structure (Reading, MA: Benjamin) vol 12 [20] Hotchkis M A C et al 1991 Nucl. Phys. A 530 111 [21] Börner H G et al 1991 Phys. Rev. Lett. 66 691
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2010, Vol. 27 
≈0.36 MeV. This band crossing is associated with the alignment of two h11/2 neutrons according to the cranked shell model calculations. The band based on the 11/2+ state is proposed as a candidate for the one-phonon γ-vibrational band, and the band built on the 15/2+ state is proposed as a candidate for the two-phonon γ-vibrational band. Other characteristics for the observed bands are discussed. 
≈0.36 MeV. This band crossing is associated with the alignment of two h11/2 neutrons according to the cranked shell model calculations. The band based on the 11/2+ state is proposed as a candidate for the one-phonon γ-vibrational band, and the band built on the 15/2+ state is proposed as a candidate for the two-phonon γ-vibrational band. Other characteristics for the observed bands are discussed.