University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Decay spectroscopy for nuclear astrophysics: β- and β-delayed proton decay

Trache, L, Banu, A, Hardy, JC, Iacob, VE, McCleskey, M, Roeder, BT, Simmons, E, Spiridon, A, Tribble, RE, Saastamoinen, A , Jokinen, A, Äysto, J, Davinson, T, Lotay, G, Woods, PJ and Pollacco, E (2012) Decay spectroscopy for nuclear astrophysics: β- and β-delayed proton decay

Full text not available from this repository.

Abstract

In several radiative proton capture reactions important in novae and XRBs, the resonant parts play the capital role. We use decay spectroscopy techniques to find these resonances and study their properties. We have developed techniques to measure beta- and beta-delayed proton decay of sd-shell, proton-rich nuclei produced and separated with the MARS recoil spectrometer of Texas A&M University. The short-lived radioactive species are produced in-flight, separated, then slowed down (from about 40 MeV/u) and implanted in the middle of very thin Si detectors. This allows us to measure protons with energies as low as 200 keV from nuclei with lifetimes of 100 ms or less. At the same time we measure gamma-rays up to 8 MeV with high resolution HPGe detectors. We have studied the decay of 23Al, 27P, 31Cl, all important for understanding explosive H-burning in novae. The technique has shown a remarkable selectivity to beta-delayed charged-particle emission and works even at radioactive beam rates of a few pps. The states populated are resonances for the radiative proton capture reactions 22Na(p,γ) 23Mg (crucial for the depletion of 22Na in novae), 26mAl(p,γ) 27Si and 30P(p,γ) 31S (bottleneck in novae and XRB burning), respectively. Lastly, results with a new detector that allowed us to measure down to about 80 keV proton energy are announced.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Authors :
NameEmailORCID
Trache, LUNSPECIFIEDUNSPECIFIED
Banu, AUNSPECIFIEDUNSPECIFIED
Hardy, JCUNSPECIFIEDUNSPECIFIED
Iacob, VEUNSPECIFIEDUNSPECIFIED
McCleskey, MUNSPECIFIEDUNSPECIFIED
Roeder, BTUNSPECIFIEDUNSPECIFIED
Simmons, EUNSPECIFIEDUNSPECIFIED
Spiridon, AUNSPECIFIEDUNSPECIFIED
Tribble, REUNSPECIFIEDUNSPECIFIED
Saastamoinen, AUNSPECIFIEDUNSPECIFIED
Jokinen, AUNSPECIFIEDUNSPECIFIED
Äysto, JUNSPECIFIEDUNSPECIFIED
Davinson, TUNSPECIFIEDUNSPECIFIED
Lotay, Gg.lotay@surrey.ac.ukUNSPECIFIED
Woods, PJUNSPECIFIEDUNSPECIFIED
Pollacco, EUNSPECIFIEDUNSPECIFIED
Date : 14 March 2012
Identification Number : 10.1088/1742-6596/337/1/012058
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:40
Last Modified : 17 May 2017 15:12
URI: http://epubs.surrey.ac.uk/id/eprint/840057

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800