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Your search keyword '"Lumley, N."' showing total 2 results
Start Over Author "Lumley, N." Publisher american institute of physics
2 results on '"Lumley, N."'

1. Lifetime measurement in the proton-unbound nucleus 109I.

Author

Procter, M. G., Cullen, D. M., Ruotsalainen, P., Scholey, C., Angus, L., Bäck, T., Cederwall, B., Dewald, A., Fransen, C., Grahn, T., Greenlees, P. T., Hackstein, M., Jakobsson, U., Jones, P. M., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., and Mason, P. J. R.

Subjects
IODINE isotopes, PROTON decay, DOPPLER effect, NUCLEAR shell theory, PARTICLES (Nuclear physics), NUCLEAR physics
Abstract

The Recoil-Distance Doppler-shift method has been combined with Recoil-Decay Tagging for the first time to measure a lifetime in the proton-unbound nucleus 109I. The lifetime value was determined using the Differential Decay-Curve method in singles mode. The result has been compared to theoretical shell-model calculations in order to better understand the nature of unbound valence nucleons at the proton drip line. [ABSTRACT FROM AUTHOR]

Published
2011
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2. A Recoil-Beta Tagging Study of N = Z nucleus 66As.

Author

Ruotsalainen, P., Scholey, C., Wadsworth, R., Jenkins, D. G., Singh, B. S. Nara, Brock, T. S., Greenlees, P. T., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., Mason, P. J. R., Nieminen, P., Nyman, M., Paterson, I., Peura, P., and Procter, M. G.

Subjects
PHYSICS experiments, EXCITED state chemistry, HEAVY particles (Nuclear physics), NUCLEAR energy, RADIOACTIVE nuclear beams, SPECTROMETERS, RADIOACTIVE decay
Abstract

A Recoil-Beta Tagging (RBT) experiment was recently performed at the accelerator laboratory at the University of Jyväskylä in order to identify T = 1 excited states in the medium-heavy N = Z = 33 nucleus 66As. The fusion-evaporation reaction 28Si(40Ca,pn)66As was employed at a beam energy of 75 MeV. The experiment was carried out utilising the JUROGAM II γ-ray spectrometer in conjunction with the gas-filled recoil separator RITU and the GREAT focal plane spectrometer system. The half-lives and ordering of the two known isomeric states in 66As have been determined. In addition, several new prompt γ-ray transitions from excited states both bypassing and decaying to the isomeric states in 66As have been observed. [ABSTRACT FROM AUTHOR]

Published
2011
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