Universität zu Köln

Mueller-Gatermann, C., Dewald, A., Fransen, C., Beckers, M., Blazhev, A., Braunroth, T., Goldkuhle, A., Jolie, J., Kornwebel, L., Reviol, W., von Spee, F. and Zell, K. O. (2020). Evolution of collectivity is Xe-118. Phys. Rev. C, 102 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9993

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Abstract

A recoil-distance Doppler shift experiment has been performed using the Pd-102(F-19, p2n) reaction at a beam energy of 73 MeV to measure the lifetime of excited states in Xe-118. The differential decay-curve method using gamma gamma coincidences and a gating procedure that allows to extract the lifetime without feeding assumptions has been employed. The lifetimes obtained for the yrast states up to spin-parity 8(+) are compared with interacting boson model calculations and Xe-118 can be classified as a transitional nucleus between the spherical and a deformed shape. Systematics of the B(E2) values for the 2(+) -> 0(+) and 4(+) -> 2(+) transitions in the isotopic chains of tin, tellurium and xenon are presented. It is proposed that a critical point exists at which the B(E2; 4(+) -> 2(+))/B(E2; 2(+) -> 0(+)) ratio drops to unity for lower neutron numbers within the isotopic chain. The position of the critical point varies with proton number, i.e., it is presumed to be located at the same mass number A = 114 in the Sn, Te, and Xe isotopes.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Mueller-Gatermann, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dewald, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fransen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Beckers, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Blazhev, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Braunroth, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Goldkuhle, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Jolie, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kornwebel, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Reviol, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED von Spee, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Zell, K. O. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-307648
DOI:	10.1103/PhysRevC.102.064318
Journal or Publication Title:	Phys. Rev. C
Volume:	102
Number:	6
Date:	2020
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9993
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REORIENTATION EFFECT MEASUREMENTS; LIFETIME MEASUREMENTS; COULOMB-EXCITATION; STATES Multiple languages Physics, Nuclear Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/30764