Complex time distributions from isomers in cascade: a case in 176Lu

Properties of the5−state at 839 keV inLu176and theMohr1, Bisterzo2, Gallino3 et al. 2009Phys. Rev. C242300View full textAdd to dashboardCite

“…This first approach clearly identifies IS from the measured branching ratios b to low-K and high-K states; however, an additional measurement of the lifetime τ of the IS has to be performed which is difficult for the relevant lifetimes of the order of several picoseconds. Lifetime measurements are further complicated by feeding in the complex decay scheme of the heavy odd-odd nucleus 176 Lu [21]. It turns out that this first approach is ideal for the identification of IS, but of limited applicability for the determination of integrated cross sections.…”

“…The M1 conversion coefficient is mainly defined by the K-shell contribution. In all experiments under study in this paper [7,13,18,19,20,21,22] 176 Lu will not be fully ionized. This is obvious for the neutron capture experiments with thermal neutrons [18,19,20] and the photoactivation with low-energy bremsstrahlung [7].…”

“…Activation after Coulomb excitation was studied at the Tandem accelerator at IPN, Orsay [13], activation using positron annihilation was measured at the Kyoto research reactor [14], and photoactivation experiments with various radioactive sources were reported in [10,15,16,17]. High-resolution gamma-spectroscopic studies were performed using the 175 Lu(n,γ) 176 Lu reaction at the GAMS spectrometer at ILL, Grenoble [18,19,20], using HPGe detectors [19,21], and using the 176 Yb(p,n) 176 Lu reaction at the Berkeley cyclotron [22]. The 177 Hf(t,α) 176 Lu reaction was studied at Los Alamos using a Q3D magnetic spectrograph [23], and the 175 Lu(d,p) 176 Lu reaction was analyzed using the Q3D spectrograph at the Munich tandem accelerator [19].…”

A LaBr3: Ce fast-timing array for DESPEC at FAIR

“…In preparation for the UK array, LaBr 3 :Ce detectors have been used to augment ex- 27 isting high-purity germanium (HpGe) arrays at the IFIN-HH, ILL and RIKEN laborato- >50 ps) using γγ coincidences [16][17][18][19][20][21][22]. At RIKEN, the half-life of 30 the yrast 2 + state in 104 Zr has been re-measured using βγ coincidences with the β-timing 31 coming from fast plastic scintillators at the front and back of the WAS3ABi (Wide-range…”

Modification of nuclear transitions in stellar plasma by electronic processes:Kisomers inLu176andGosselin1, Morel2, Mohr3 2010Phys. Rev. C130160View full textAdd to dashboardCite

“…However, indirect transitions between the low-K and the high-K states are possible via so-called intermediate states (IMS) that are located at higher excitation energies and have intermediate K-quantum numbers. Such IMS have been detected experimentally by high-resolution γ-ray spectroscopy for 176 Lu [12][13][14][15][16], and an indirect proof for the existence of IMS was obtained from various photoactivation studies [17][18][19][20][21][22][23][24][25][26]. A review of the results for 176 Lu is given in [5].…”