Pairing properties of the double-beta emitter Cd-116

Sharp, D. K.; Freeman, S. J.; Cropper, B. D.; Davies, P. J.; Faestermann, T.; Hatfield, T. M.; Hertenberger, R.; Hughes, S. J. F.; MacGregor, P. T. und Wirth, H-F (2019): Pairing properties of the double-beta emitter Cd-116. In: Physical Review C, Bd. 100, Nr. 2, 024329

Abstract

The pairing properties of the neutrinoless double-beta decay candidate Cd-116 have been investigated. Measurements of the two-neutron removal reactions on isotopes of Cd-114,Cd-116 have been made in order to identify 0(+) strength in the residual nuclei up to approximate to 3 MeV. No significant L = 0 strength has been found in excited states indicating that the Bardeen-Cooper-Schrieffer (BCS) approximation is a reasonable basis to describe the neutrons in the ground state. This approximation avoids complications in calculations of double-beta decay matrix elements that use the quasiparticle random-phase approximation (QRPA) techniques. However this is not the case for the protons, where pair vibrations are prevalent and the BCS approximation is no longer valid, complicating the use of traditional QRPA techniques for this system as a whole.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik
• ISSN: 2469-9985
• Sprache: Englisch