Eur. Phys. J. A (2005) 25: 159-160
https://doi.org/10.1140/epjad/i2005-06-166-1

ENAM 2004

Particle-core coupling in the transitional proton emitters ^{145, 146, 147}Tm

¹ Argonne National Laboratory, 60439, Argonne, IL, USA
² University of Edinburgh, Edinburgh, UK
³ CEN Bordeaux-Gradignan, IN2P3-CNRS, Gradignan Cedex, France
⁴ University of Manchester, Manchester, UK
⁵ University of Maryland, 20742, College Park, MD, USA
⁶ NNDC Brookhaven National Laboratory, 11937, Upton, NY, USA

^* e-mail: seweryniak@anl.gov

Received: 20 December 2004
Accepted: 18 February 2005
Published online: 7 July 2005

Abstract

Excited states in 3 transitional proton emitters ^{145, 146, 147}Tm were studied using the Gammasphere Ge array coupled with the Argonne Fragment Mass Analyzer. The ¹⁴⁷Tm level scheme was extended and the unfavored signature partner of the decoupled proton h _11/2 band was found. A rotational band feeding the high-spin isomer in ¹⁴⁶Tm was observed with properties similar to the ¹⁴⁷Tm ground-state band. A regular sequence of γ rays correlated with the ground-state ¹⁴⁵Tm proton decay has properties of the h _11/2 band as well. In addition, coincidences between the fine structure proton line and the 2⁺ → 0⁺ γ-ray transition in the daughter nucleus were detected. Comparison between level energies measured and calculated using the Particle Rotor model indicates that ¹⁴⁵Tm might be γ-soft.