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Ross, T. J.*; Hughes, R. O.*; Allmond, J. M.*; Beausang, C. W.*; Angell, C.; Basunia, M. S.*; Bleuel, D. L.*; Hurke, J. T.*; Casperson, R. J.*; Escher, J. E.*; et al.
Physical Review C, 90(4), p.044323_1 - 044323_12, 2014/10
被引用回数:7 パーセンタイル:45.30(Physics, Nuclear)Low-spin single quasi neutron levels in Gd and
Gd have been studied following the
Gd (
)
Gd and
Gd (
)
Gd reactions. A combined Si telescope and high-purity germanium array was utilized, allowing
-
and
-
-
coincidence measurements. Almost all of the established low-excitation-energy, low-spin structures were confirmed in both
Gd and
Gd. Several new levels and numerous new
rays are observed in both nuclei, particularly for
1 MeV. Residual effects of a neutron sub shell closure at
= 64 are observed in the form of a large excitation energy gap in the single quasi neutron level schemes.
Ross, T. J.*; Hughes, R. O.*; Beausang, C. W.*; Allmond, J. M.*; Angell, C.; Basunia, M. S.*; Bleuel, D. L.*; Burke, J. T.*; Casperson, R. J.*; Escher, J. E.*; et al.
Physical Review C, 88(3), p.031301_1 - 031301_4, 2013/09
被引用回数:7 パーセンタイル:46.30(Physics, Nuclear)Odd-mass gadolinium isotopes around = 90 were populated by the (
) reaction, utilizing 25-MeV protons, resulting in population of low-spin quasi-neutron states at energies near and below the Fermi surface. Systematics of the single quasi-neutron levels populated are presented. A large excitation energy gap is observed between levels originating from the
,
and
spherical parents (above the
= 64 gap), and the
(below the gap) indicating that the spherical shell model level spacing is maintained at least to moderate deformations.
Ross, T. J.*; Beausang, C. W.*; Hughes, R. O.*; Scielzo, N. D.*; Burke, J. T.*; Allmond, J. M.*; Angell, C.; Basunia, M. S.*; Bleuel, D. L.*; Casperson, R. J.*; et al.
Physical Review C, 86(6), p.067301_1 - 067301_5, 2012/12
被引用回数:3 パーセンタイル:22.19(Physics, Nuclear)Low-spin, high-excitation energy states in Y have been studied using the
Y(
) reaction. For this experiment a 25 MeV proton beam was incident upon a mono-isotopic
Y target. A silicon telescope array was used to detect deuterons and coincident
rays were detected using a germanium clover array. Most of the known low-excitation energy low-spin states populated strongly via the (
) reaction mechanism are confirmed. Two states are seen for the first time and seven new transitions, including one which by-passes the two low-lying isomeric states, are observed.
Ross, T. J.*; Beausang, C. W.*; Hughes, R. O.*; Allmond, J. M.*; Angell, C.; Basunia, M. S.*; Bleuel, D. L.*; Burke, J. T.*; Casperson, R. J.*; Escher, J. E.*; et al.
Physical Review C, 85(5), p.051304_1 - 051304_5, 2012/05
被引用回数:11 パーセンタイル:52.07(Physics, Nuclear)代理反応法は、20%の精度でアクチニド核の中性子捕獲断面積を評価することができるが、希土類核に対しては、直接測定した中性子捕獲断面積と23倍の不一致がある。これは、スピン/パリティの生成分布の違いによるものであると考えられる。このことを確かめるために、代理反応におけるガドリニウム核の角運動量移行の測定を行った。