Naslov
High-energy two-neutron removal from 10Be

Autori
Ashwood, N.I. ; Freer, M. ; Millener, D.J. ; Orr, N.A. ; Carstoiu, F. ; Ahmed, S. ; Angelique, J.C. ; Bouchat, V. ; Catford, W.N. ; Clarke, N.M. ; Curtis, N. ; Hanappe, F. ; Horoi, M. ; Kerckx, Y. ; Lecouey, J.L. ; Marques, F.M. ; Materna, T. ; Normand, G. ; Pain, S. ; Soić, Neven ; Timis, C. ; Unshakova, A. ; Ziman, V.A.

Izvornik
Physical review. C, Nuclear physics (0556-2813) 72 (2005), 2;

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
neutron removal; nuclear structure; light nuclei

Sažetak
A kinetically complete measurement of the 12C(10Be, alpha+alpha+n) and (10Be, alpha+alpha) reactions has been performed at a beam energy of 30 MeV/nucleon. The charged beam velocity particles were detected in an array of Si-CsI detectors placed at zero degrees, and the neutrons in an 81-element neutron array. The coincident detection of the final-state particles, produced in the breakup of 10Be, allowed the reconstruction of the excitation energy in the 8Be and 9Be systems. States in 8Be were identified, in particular the ground and first-excited states ; and in 9Be, states at 1.68, 2.43, and (2.78, 3.05) MeV were observed. The population of these levels, in particular the 2.43 MeV 5/2- level, suggests that collective excitations play an important role in the neutron removal process. Distorted wave Born approximation and Glauber-type calculations have been used to model the direct neutron removal from the 10Be ground state and the two-step removal via inelastic excitations of the 10Be(2+) and 9Be(5/2-) excited states.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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