Evidence for a 3.8 MeV state in 9Be

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SMITH, Robin, WHELDON, Carl, FREER, Martin, CURTIS, Neil, KOKALOVA, Tzany, ALMARAZ-CALDERON, S., APRAHAMIAN, A., ASHWOOD, N. I., BARR, M., BUTCHER, B., COPP, P., COUDER, M., FANG, X., GOLDRING, G., JUNG, F., LESHER, S. R., LU, W., MALCOLM, J. D., ROBERTS, A., TAN, W. P. and ZIMAN, V. A. (2016). Evidence for a 3.8 MeV state in 9Be. Physical Review C (PRC), 94, 014320. [Article]

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21580:494177

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21580:494177

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Abstract

The breakup reaction 9Be(4He,3a)n was measured using an array of four double-sided silicon strip detectors at beam energies of 22 and 26 MeV. Excited states in 9Be up to 8 MeV were populated and reconstructed through measurements of the charged reaction products. Evidence is given for a state in 9Be at 3.82-0.09+0.08 MeV with width=1240-90+270 keV. This is consistent with two recent measurements of a state with similar properties in the mirror nucleus 9B. An analysis of the reduced widths (Beg.s.8 channel) of this state along with the proposed mirror state has led to a firm limit of J<=7/2 and a tentative assignment of J^pi=1/2- or 3/2-.

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Official URL:

https://journals.aps.org/prc/abstract/10.1103/Phys...

Page Range:

014320

Identifiers

Identification Number:

10.1103/PhysRevC.94.014320

ORCID for Robin Smith: