Author:

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, ODD BI ISOTOPES, LASER ION-SOURCE, ALPHA-DECAY, NEUTRON-DEFICIENT, ATOMIC SPECTROSCOPY, TL ISOTOPES, MASS NUCLEI, COEXISTENCE, BEHAVIOR, MODEL, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

Decay spectroscopy of 184Tl has been performed at the CERN Isotope Separator On-Line (ISOLDE) facility. An excitation energy of 506.1(1) keV and a half-life of 47.1(7) ms of the intruder based (10−) state have been extracted. The internal decay characteristics of this state are determined and discussed, extending the systematics of such states in the even-mass thallium nuclei below neutron midshell at N = 104. The retardation factors of the isomeric M2 and E3 transitions are deduced and compared with retardation factors in neighboring odd-mass and even-mass thallium isotopes. The new information is combined with a review of hindered and unhindered α-decay data of 187–192Bi populating levels in daughter nuclei 183–188Tl and supports the interpretation of the intruder character of the (10−) state in 184Tl.