Detailed Gamma Ray Spectroscopy of 31Si using GAMMASPHERE and MICROBALL
Abstract
I participated in an experiment carried out at Argonne National Laboratory to investigate the relation between normal and intruder states in the s-d shell of neutron-rich nuclei. The experiment used a 25 MeV 18O beam incident on an 18O target with a thick Ta backing. Gamma rays were detected by the 101 Compton-suppressed HPGe detectors that comprise the GAMMASPERE array and channel selectivity was provide by MICROBALL's 95 CSI(Tl) scintillators. This work focuses on the nuclear structure of 31Si through measuring nuclear state decays. α-γ and α-γ-γ coincidence data are being analyzed by the in-house software package GNUSCOPE. Preliminary spectroscopic results have currently verified 13 previously known transitions and 22 new gamma ray de-excitations have been identified. Both the positive and negative parity states have so far compared well with shell model calculations using the WBP-a interaction.
- Publication:
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APS Meeting Abstracts
- Pub Date:
- October 2009
- Bibcode:
- 2009APS..HAW.GB047H