SHORT-RANGE LIFETIME MEASUREMENTS FOR DEEP-INELASTIC REACTION PRODUCTS: THE 19O TEST CASE
Küçük Resim Yok
Tarih
2020
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Jagiellonian Univ Press
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
An experiment, aiming at measuring lifetimes of excited states in neutron-rich C and O isotopes, was performed at the GANIL laboratory with the use of the AGATA segmented HPGe tracking array, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The nuclei of interest were populated in transfer and deep-inelastic processes induced by an O-18 beam at 126 MeV (7.0 MeV/u) on a Ta-181 target. This paper contains a brief description of a novel implementation of a Monte-Carlo technique, which allowed us to obtain excited states lifetimes in the range from tens to hundreds femtoseconds for a reaction with complex initial velocity distribution, making use of the Doppler-shift attenuation method (DSAM). As a test case, we present here the analysis for two states in O-19: 2371-keV 9/2(+) and 2779-keV 7/2(+), for which lifetimes of tau > 400 fs and tau = 140(-40)(+50) fs were obtained, respectively, in agreement with literature values. This newly developed approach will be essential for short lifetimes measurements in neutron-rich systems, exploiting intense ISOL-type beams, currently under development.
Açıklama
36th Mazurian Lakes Conference on Physics -- SEP 01-07, 2019 -- Piaski, POLAND
Anahtar Kelimeler
Agata, Spectroscopy, Isotopes, States
Kaynak
Acta Physica Polonica B
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
51
Sayı
3
