γ Degree of Freedom for the <SUP>178</SUP>Hf Isomeric State

TU Ya; CHEN Yong-Shou; GAO Zao-Chun

Chinese Physics C> 2006, Vol. 30> Issue(S2) : 109-111

γ Degree of Freedom for the ¹⁷⁸Hf Isomeric State

China Institute of Atomic Energy, Beijing 102413, China2 Institute of Theoretical Nuclear Physics, Chinese Academy of Sciences, Beijing 100080, China

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Abstract：
We have perfomed calculations for the six rotational bands in ¹⁷⁸Hf which have been found experimentally by using triaxial projected shell model (TPSM). The γ band can be well reproduced with γ=22°. By using the same γ value, the present calculations predict a γ-band built on ^178m2Hf(16⁺) state, and its band head (I=14⁺)lies about 900keV above the ^178m2Hf(16⁺) state. This 14⁺ state should be rather easily excited from the 16⁺ isomeric state because of the same intrinsic configuration of these two states. It is hope that the 14⁺ state could have more probable chance to decay into the ground state band than that from the ^178m2Hf(16⁺) state, and then to realize the de-excitation of the isomeric state.

References

[1]

. Apranamian A, Sun Y. Nature Phys., 2005, 1: 80-812. Walker P M, Carroll J J. Phys. Today, 2005, 58: 39-443. Walker P M, Dracoulis G D. Nature, 1999, 399: 35-404. Sherman M S. Science Technol. Rev., 2005, July/August:24-255. Ahmad I, Banar J C, Becker J A et al. Phys. Rev., 2005,C71: 0243116. Sheikh J A, Hara K. Phys. Rev. Lett., 1999, 82: 39687. GAO Z C, SUN Y, CHEN Y S. Phys. Lett., 2006, B634:1958. Jain, Sheline, Sood. Rev. Mod. Phys., 1990, 62: 4009. Hayes A B, Cline D, WU C Y et al. Phys. Rev. Lett., 2002,89: 24250110. Mullins S M, Dracoulis G D, Byrne A P et al. Phys. Lett.,1997, B400: 40111. Mullins S M, Dracoulis G D, Byrne A P et al. Phys. Lett.,1997, B393: 279-284

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TU Ya, CHEN Yong-Shou and GAO Zao-Chun. γ Degree of Freedom for the ¹⁷⁸Hf Isomeric State[J]. Chinese Physics C, 2006, 30(S2): 109-111.

TU Ya, CHEN Yong-Shou and GAO Zao-Chun. γ Degree of Freedom for the ¹⁷⁸Hf Isomeric State[J]. Chinese Physics C, 2006, 30(S2): 109-111. shu

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Received: 2006-10-16
Revised: 1900-01-01

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

γ Degree of Freedom for the ¹⁷⁸Hf Isomeric State

Corresponding author: TU Ya,

China Institute of Atomic Energy, Beijing 102413, China2 Institute of Theoretical Nuclear Physics, Chinese Academy of Sciences, Beijing 100080, China

Received Date: 2006-10-16
Accepted Date: 1900-01-01
Available Online: 2006-01-03

Abstract: We have perfomed calculations for the six rotational bands in ¹⁷⁸Hf which have been found experimentally by using triaxial projected shell model (TPSM). The γ band can be well reproduced with γ=22°. By using the same γ value, the present calculations predict a γ-band built on ^178m2Hf(16⁺) state, and its band head (I=14⁺)lies about 900keV above the ^178m2Hf(16⁺) state. This 14⁺ state should be rather easily excited from the 16⁺ isomeric state because of the same intrinsic configuration of these two states. It is hope that the 14⁺ state could have more probable chance to decay into the ground state band than that from the ^178m2Hf(16⁺) state, and then to realize the de-excitation of the isomeric state.