Conversion–electron gamma–ray coincidence spectroscopy of superdeformed $^{135}$Nd

B. Aengenvoort; W. Korten; H. Hübel; S. Chmel; A. Görgen; U.J. van Severen; W. Pohler; R. Zinken; T. Härtlein; C. Ender; F. Köck; P. Reiter; D. Schwalm; F. Schindler; J. Gerl; R. Schubart; F. Azaiez; S. Bouneau; J. Duprat; I. Deloncle

doi:doi:10.1007/s100500050070

2021 Impact factor 3.131

Hadrons and Nuclei

Eur. Phys. J. A 1, 359-364

Conversion-electron gamma-ray coincidence spectroscopy of superdeformed ¹³⁵Nd

B. Aengenvoort¹ - W. Korten^1,a - H. Hübel¹ - S. Chmel¹ - A. Görgen¹ - U.J. van Severen¹ - W. Pohler¹ - R. Zinken¹ - T. Härtlein² - C. Ender² - F. Köck² - P. Reiter² - D. Schwalm² - F. Schindler³ - J. Gerl⁴ - R. Schubart⁴ - F. Azaiez⁵ - S. Bouneau⁵ - J. Duprat⁵ - I. Deloncle⁶

¹ Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany
² Max-Planck Institut für Kernphysik, Saupfercheckweg 1, D-69029 Heidelberg, Germany
³ Ludwig-Maximilians-Universität München, Am Coulombwall 1, D-85748 Garching, Germany
⁴ Gesellschaft für Schwerionenforschung, Planckstr. 1, D-64291 Darmstadt, Germany
⁵ Institut de Physique Nucléaire, IN2P3/CNRS, F-91406 Orsay Campus, France
⁶ CSNSM, IN2P3/CNRS, F-91405 Orsay Campus, France

Received: 22 December 1997 / Revised version: 19 January 1998 Communicated by B. Herskind

Abstract
Three mini-orange conversion-electron spectrometers and four Euroball Ge Cluster detectors have been used for $\gamma$ -e^- coincidence spectroscopy of superdeformed ¹³⁵Nd. Transitions within the superdeformed band are shown to have the expected E2 multipolarity. The 766.5-keV transition which links the band to a positive-parity state has a conversion coefficient consistent with M1 multipolarity. Consequently, positive parity is deduced for the superdeformed band. No evidence for E0 transitions was found.

PACS
21.10.Hw Spin, parity and isobaric spin - 23.20.Nx Internal conversion and extranuclear effects - 23.20.Js Multipole matrix elements - 27.60.+j $90 \le A \le 149$