Measurement of Lifetimes in 23Mg
O. S. Kirsebom, P. Bender, A. Cheeseman, G. Christian, R. Churchman,, D. S. Cross, B. Davids, L. J. Evitts, J. Fallis, N. Galinski, A. B., Garnsworthy, G. Hackman, J. Lighthall, S. Ketelhut, P. Machule, D. Miller, C., R. Nobs, C. J. Pearson, M. M. Rajabali, A. J. Radich
TL;DR
This paper reports the first measurements of certain lifetimes in 23Mg using the Doppler-shift attenuation method, including an upper limit for a key astrophysical state, supported by Monte Carlo simulations.
Contribution
First lifetime measurements of 23Mg states using Doppler-shift attenuation, with a novel Monte Carlo simulation for gamma-ray line shape modeling.
Findings
Upper limit of 12 fs for 7787 keV state in 23Mg
First lifetime measurements for several states in 23Mg
Development of Monte Carlo code for gamma-ray line shape
Abstract
Several lifetimes in 23Mg have been determined for the first time using the Doppler-shift attenuation method. A Monte Carlo simulation code has been written to model the gamma-ray line shape. An upper limit of 12 fs at the 95% C.L. has been obtained for the astrophysically important 7787 keV state.
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