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Andel, B.*; Van Duppen, P.*; Andreyev, A. N.; Blazhev, A.*; Grawe, H.*; Lica, R.*; Nadja, H.*; Stryjczyk, M.*; 他52名*
Physical Review C, 104(5), p.054301_1 - 054301_13, 2021/11
被引用回数:7 パーセンタイル:57.44(Physics, Nuclear)A new -decaying state in
Bi has been identified at the ISOLDE Decay Station at the CERN-ISOLDE facility. A preferred
assignment was suggested for this state based on the
-decay feeding pattern to levels in
Po and shell-model calculations. The half-life of the
state was deduced to be
min. The deexcitation of the levels populated in
Po by the
decay of this state was investigated via
coincidences and a number of new levels and transitions were identified. Shell-model calculations for excited states in
Bi and
Po were performed using two different effective interactions: the H208 and the modified Kuo-Herling particle interaction. Both calculations agree on the interpretation of the new
-decaying state as an
isomer and allow for the tentative assignment of shell-model states to several high-spin states in
Po.
Brunet, M.*; Podolyk, Zs.*; Berry, T. A.*; Brown, B. A.*; Carroll, R. J.*; Lica, R.*; Sotty, Ch.*; Andreyev, A. N.; Borge, M. J. G.*; Cubiss, J. G.*; et al.
Physical Review C, 103(5), p.054327_1 - 054327_13, 2021/05
被引用回数:7 パーセンタイル:63.10(Physics, Nuclear)The structure of Po populated through the EC/
decay of
At is investigated using
-ray spectroscopy at the ISOLDE Decay Station. The presented level scheme contains 27 new excited states and 43 new transitions, as well as a further 50 previously observed
rays which have been (re)assigned a position. Through the analysis using the shell model calculations approximately half of the
-decay strength of
At is found to proceed via allowed decay and half via first-forbidden decay. The first-forbidden transitions predominantly populate core excited states at high excitation energies, which is qualitatively understood using shell model considerations.
Jentschel, M.*; Blanc, A.*; de France, G.*; Kster, U.*; Leoni, S.*; Mutti, P.*; Simpson, G.*; Soldner, T.*; Ur, C.*; Urban, W.*; et al.
Journal of Instrumentation (Internet), 12(11), p.P11003_1 - P11003_33, 2017/11
被引用回数:43 パーセンタイル:84.98(Instruments & Instrumentation)A highly efficient array of high-purity germanium (HPGe) detectors was developed and operated at the cold neutron beam facility PF1B of the Institut Laue-Langevin (ILL) to carry out nuclear structure studies, via measurements of -rays following neutron-induced capture and fission reactions. The setup consisted of a collimation system producing a pencil beam with a thermal capture equivalent flux of about 10
ns
cm
at the target position and negligible neutron halo. The target was surrounded by an array of eight to ten anti-Compton shielded EXOGAM Clover detectors, four to six anti-Compton shielded large coaxial GASP detectors and two standard Clover detectors. For a part of the campaign the array was combined with 16 LaBr
:(Ce) detectors from the FATIMA collaboration.
Lund, M. V.*; Andreyev, A. N.; Borge, M. J. G.*; Cederkll, J.*; De Witte, H.*; Fraile, L. M.*; Fynbo, H. O. U.*; Greenlees, P. T.*; Harkness-Brennan, L. J.*; Howard, A. M.*; et al.
European Physical Journal A, 52(10), p.304_1 - 304_14, 2016/10
被引用回数:19 パーセンタイル:75.67(Physics, Nuclear)Beta-delayed proton emission from Mg has been measured at ISOLDE, CERN, with the ISOLDE Decay Station setup including both charged-particle and
-ray detection capabilities. A total of 27 delayed proton branches were measured including seven so far unobserved. An updated decay scheme, including three new resonances above the proton separation energy in
Na and more precise resonance energies, is presented. Beta-decay feeding to two resonances above the Isobaric Analogue State in
Na is observed. This may allow studies of the 4032.9(2.4) keV resonance in
Ne through the beta decay of
Mg, which is important for the astrophysically relevant reaction
O(
,
)
Ne. Beta-delayed protons were used to obtain a more precise value for the half-life of
Mg, 91.4(1.0) ms.