High-spin terminating states in theN=88Ho155and

Abstract

REVT E X 4:155 Ho -loss of collectivity 2 AbstractThe

General properties of terminating bands in the A = 110 and A = 160 mass regions

“…Also, negative parity bands 6, (6a) 1 in 155 Ho and at high spin, band 2 (α = −1/2) in 157 Ho are assigned to the [03 + ; 2] configuration, which are consistent with the findings in [31,33].…”

“…Bands 2 and 4 of 157 Ho in both signatures have a regular collective behavior at low-spin, which is assigned to the [47 + ; 2] and [3 + 6; 2] configurations, respectively. But above I ∼ 30 in band 2 (α = − 1/2) and also, at the end to the band 5b and do not confirm the assignment of [1 + 4; 2] terminating-configuration to it in [31].…”

“…It is not clear which one experimental bands 4, 5 or 6 can be attributed to this expectation, due to the lack of experimental data. But by regarding to the low-spin portion of the lowest (+,+) band in 155 Ho (band 3) which has quasi-particle configuraion as A p (B p )AE [31]; we predict band 5 of 157 Ho with similar quasi-particle structure as A p (B p )AE → A p (B p )AE ⊗ BC [33], terminates within [03 + ; 3 − ] configuration at high spin.…”

“…Positive parity bands 5, 5a in 155 Ho and (+, ± ) bands in 156 Ho have been assigned to the closed-core [03 + ; 1 + ] and [03 + ; 2] terminating configurations in both signatures, respectively [31,32]. It is expected similar configuration for 157 Ho with one more neutron relative to 156 Ho, [03 + ; 3 − ], see figure 3 (b).…”

“…The lowest observed bands in 155 Ho [31], 156 Ho [32], 157 Ho [33,34] which were studied experimentally up to high spin , are compared to their CNS assignment in figures 3 and 4 for positive and negative parity, respectively.…”