6533b7d2fe1ef96bd125f684
RESEARCH PRODUCT
Mass Measurement on the rp-Process Waiting Point 72Kr
H. J. KlugeMarkku OinonenD. BeckGeorges AudiHendrik SchatzGeorg BollenDaniel RodríguezAri JokinenFrank HerfurthAlban KellerbauerVeli KolhinenKlaus BlaumKlaus BlaumJ. ÄYstöE. SauvanStefan Schwarzsubject
PhysicsNuclear and High Energy PhysicsLarge Hadron Collider26.30.+k 21.10.Dr 27.50.+e 32.10.Bi010308 nuclear & particles physicsHadronrp-process[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]Mass spectrometryPenning trap01 natural sciencesISOLTRAPnuclei with mass number 59 to 89particle trapsNuclear physicsnuclear massNucleosynthesis0103 physical sciencesNuclear fusionNuclear Physics - Experimentnucleon-nucleus reactions010306 general physicsNuclear Experimentbeta-decayNuclear Physicsdescription
The mass of one of the three major waiting points in the astrophysical rp process $^{72}$Kr was measured for the first time with the Penning trap mass spectrometer ISOLTRAP. The measurement yielded a relative mass uncertainty of $\deltam/m = 1.2\times 10–7 (\deltam$ = 8 keV). $^{73,74}$Kr, also needed for astrophysical calculations, were measured with more than 1 order of magnitude improved accuracy. We use the ISOLTRAP masses of $^{72–74}$Kr to reanalyze the role of $^{72}$Kr (T$_{1/2}$ = 17.2 s) in the rp process during x-ray bursts and conclude that $^{72}$Kr is a strong waiting point delaying the burst duration with at least 80\% of its $\beta$-decay half-life.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-09-12 |