β-delayed proton decay of24Si

Abstract

A novel experimental approach has been employed for the measurement of ␤-delayed protons from 24 Si produced via the fragmentation of a 28 Si beam with an energy of 100 MeV/nucleon. The secondary beam of 24 Si was separated by the projectile fragment separator RIPS at RIKEN and was implanted in a 2.6 m aluminum foil placed parallel to a gas-⌬E and silicon-E detector telescope for the measurement of delayed protons. The above arrangement has led to a very clean, ␤-ray background free delayed proton energy spectra and a few new proton peaks could be identified from the decay of 24 Si.

Spectroscopy ofAl24and extraction of Gamow-Teller strengths with theMg24Zegers1, Meharchand2, Adachi3 et al. 2008Phys. Rev. C241121View full textAdd to dashboardCite

“…Two other 1 + states found at 4.386 MeV and 5.869 MeV were not seen in the (p, n) data. These states likely correspond to 1 + states measured at 4.40 MeV and 5.76 MeV in the measurement of β-delayed proton decay of 24 Si β [29] (Ref. [38] reports the former of these two at 4.38(5) MeV).…”

“…g Likely corresponds to a 1 + state observed in the β-delayed proton decay of 24 Si [29] (see text).…”

“…To extract the GT strength [B(GT)] for each state in the eikonal approximation [11,12] knowledge of 1 Since 24 Mg has N=Z, no excitation of the isobaric analog state (∆L = 0, ∆S = 0) is expected. A T = 2 0 + state has been found at 5.957 MeV [29] but it cannot be excited in the ∆T = 1 ( 3 He,t) reaction on 24 Mg (T = 0) the unit cross section (σ) and the differential cross section at zero momentum transfer (q = 0) is required:…”

Theoretical Description Of Beta-delayed Proton Emission Of Proton-rich sd- And pf- Shell Nuclei

“…Partial-decay scheme of 24 Si. In spite of numerous previous studies [18,19,20], the most complete information comes from the recent measurement done by Ichikawa et al [21,22] which included β -γ coincidences. This was crucial in finding the β feeding of the two lowest 1 + states of 24 Al.…”

Spectroscopy of 24Al and extraction of Gamow-Teller strengths with the 24Mg(3He,t) reaction at 420 MeV

“…To extract the GT strength [B(GT)] for each state in the eikonal approximation [11,12] knowledge of 1 Since 24 Mg has N=Z, no excitation of the isobaric analog state (∆L = 0, ∆S = 0) is expected. A T = 2 0 + state has been found at 5.957 MeV [29] but it cannot be excited in the ∆T = 1 ( 3 He,t) reaction on 24 Mg (T = 0)…”