The deformation driving tendency of various single particle orbitals near the Fermi surface has been investigated with the lifetime measurements of high spin states in the non-yrast bands of ^(177)Re nucleus.For this ...The deformation driving tendency of various single particle orbitals near the Fermi surface has been investigated with the lifetime measurements of high spin states in the non-yrast bands of ^(177)Re nucleus.For this study,the ^(165)Ho(^(16)O,4n)^(177) Re reaction at a beam energy of 84 MeV was used.Lifetimes of four lowest levels in theπi13/2[660] 1/2^(+)band and four levels in the πd_(5/2)[402]5/2^(+)(α=-1/2) band were measured.The extracted transition quadrupole moments for the πi13/2intruder band showed a sharp increase with increasing level spin,indicating a significant shape transition in the nucleus.The average transitional quadrupole moment(Q_(t)),a measure of deformation,for the πi_(13/2) band was significantly larger(Q_(t)~8.7(6) eb) compared with the πd5/2(Q_(t)~6.3(5) eb) band.To interpret the observed shape changes in the two bands,the experimental transition probabilities for these bands were compared with the re sults obtained from Projected Shell Model(P SM) calculations.展开更多
基金Supported by the Science and Education Research Board (SERB) of the Department of Science and Technology, Government of India (CRG/2018/003-495)the financial assistance from the University Grants Commission (UGC), India+1 种基金the Science and Engineering Research Board (SERB), Department of Science and Technology (Govt. of India) for providing financial assistance under Project (CRG/2019/004960) to carry out a part of the present research workThe financial support provided by the Institute of Eminence (IoE), Delhi University under FRP Grant 2022-23。
文摘The deformation driving tendency of various single particle orbitals near the Fermi surface has been investigated with the lifetime measurements of high spin states in the non-yrast bands of ^(177)Re nucleus.For this study,the ^(165)Ho(^(16)O,4n)^(177) Re reaction at a beam energy of 84 MeV was used.Lifetimes of four lowest levels in theπi13/2[660] 1/2^(+)band and four levels in the πd_(5/2)[402]5/2^(+)(α=-1/2) band were measured.The extracted transition quadrupole moments for the πi13/2intruder band showed a sharp increase with increasing level spin,indicating a significant shape transition in the nucleus.The average transitional quadrupole moment(Q_(t)),a measure of deformation,for the πi_(13/2) band was significantly larger(Q_(t)~8.7(6) eb) compared with the πd5/2(Q_(t)~6.3(5) eb) band.To interpret the observed shape changes in the two bands,the experimental transition probabilities for these bands were compared with the re sults obtained from Projected Shell Model(P SM) calculations.
