scholarly journals Lifetime measurements in $$^{182}\hbox {Pt}$$ using $$\gamma $$–$$\gamma $$ fast-timing

2021 ◽  
Vol 57 (5) ◽  
Author(s):  
G. Häfner ◽  
A. Esmaylzadeh ◽  
J. Jolie ◽  
J.-M. Régis ◽  
C. Müller-Gatermann ◽  
...  

AbstractThe level lifetimes of the $$2_1^+$$ 2 1 + and $$4_1^+$$ 4 1 + states in $$^{182}\hbox {Pt}$$ 182 Pt have been re-measured employing the $$\gamma $$ γ –$$\gamma $$ γ fast-timing technique using fast $$\hbox {LaBr}_3$$ LaBr 3 (Ce) scintillators. Excited states in the nucleus of interest were populated by the fusion-evaporation reaction $$^{170}\hbox {Yb}(^{16}\hbox {O},\hbox {4n})^{182}\hbox {Pt}$$ 170 Yb ( 16 O , 4n ) 182 Pt at a beam energy of 87 MeV provided by the FN Tandem accelerator of the University of Cologne. The lifetime of the $$2_1^+$$ 2 1 + state was re-measured with high accuracy to be $$\tau = 563(12)~$$ τ = 563 ( 12 ) ps and resolves inconsistencies from previous measurements. Experimental results are compared to theoretical calculations in the framework of the sd-IBM with and without configuration mixing.

2006 ◽  
Vol 15 (07) ◽  
pp. 1531-1540 ◽  
Author(s):  
D. TONEV ◽  
P. PETKOV ◽  
D. L. BALABANSKI ◽  
G. DE ANGELIS ◽  
A. GADEA ◽  
...  

Lifetimes of exited states in 134 Pr were measured be means of the recoil distance Doppler-shift and Doppler-shift attenuation techniques. The experiments were performed at IReS, Strasbourg using the EUROBALL IV spectrometer, in conjunction with the inner BGO ball and the Cologne coincidence plunger apparatus. Exited states in 134 Pr were populated in the fusion-evaporation reaction 119 Sn (19 F , 4 n )134 Pr . Reduced transition probabilities in 134 Pr are compared to the predictions of the two quasiparticle+triaxial rotor and interacting boson fermion-fermion models. The experimental results do not support the presence of static chirality in 134 Pr underlying the importance of shape fluctuations. Only within a dynamical context the presence of intrinsic chirality in 134 Pr can be supported.


2014 ◽  
Vol 89 (6) ◽  
Author(s):  
C. R. Niţă ◽  
D. Bucurescu ◽  
N. Mărginean ◽  
M. Avrigeanu ◽  
G. Bocchi ◽  
...  

2019 ◽  
Vol 223 ◽  
pp. 01042
Author(s):  
A. Montaner-Pizá ◽  
B. Rubio ◽  
D. Mücher ◽  
S.E.A. Orrigo ◽  
E.C. Simpson ◽  
...  

The non-yrast states of the odd-odd nucleus 56Co have been investigated by studying the γ-rays induced in the predominantly fusion-evaporation reaction 56Fe(p,n γ)56Co at an incident energy of 10 MeV. The γ-rays were measured in-beam with four high-resolution MINIBALL-triple germanium (Ge) detectors. The experiment provided excellent data in γ-γ coincidences. The complex level scheme of 56Co was constructed mainly based on the analysis of these γ-γ coincidences. The angular distributions of the γ-rays were also analysed and allowed us to assign spin-parity values to most of the excited states in this nucleus. Despite the extensive work previously done studying the 56Co nucleus, the analysis presented in this work has resulted in a large improvement in the knowledge of its structure.


1979 ◽  
Vol 161 (2) ◽  
pp. 291-297 ◽  
Author(s):  
N.R.F. Rammo ◽  
A.M. Al-Naser ◽  
A.H. Behbehani ◽  
L.L. Green ◽  
A.N. James ◽  
...  

2018 ◽  
Vol 194 ◽  
pp. 03002 ◽  
Author(s):  
Milena Stoyanova ◽  
Georgi Rainovski ◽  
Jan Jolie ◽  
Norbert Pietralla ◽  
Andrey Blazhev ◽  
...  

Low-lying yrast states in 204Po and 206Po have been investigated by the γ-γ fast timing technique with LaBr3(Ce) detectors. Excited states of these nuclei were populated in the 197Au(11B,4n) and the 198Pt(12C,4n) fusion-evaporation reactions, respectively, at the FN-Tandem Facility at the University of Cologne. The lifetimes of the 4+1 states in both nuclei were measured, along with an upper limit for the 2+1 state in 204Po. The preliminary results are discussed in the scope of the systematic behavior of the transition strengths between yrast states in polonium isotopes.


2012 ◽  
Vol 70 (7) ◽  
pp. 1337-1339 ◽  
Author(s):  
T. Alharbi ◽  
P.J.R. Mason ◽  
P.H. Regan ◽  
Zs. Podolyák ◽  
N. Mărginean ◽  
...  

2019 ◽  
Vol 18 ◽  
pp. 169
Author(s):  
S. F. Ashley ◽  
... Et al.

Lifetimes of the excited states in the yrast band of 102Pd have been deter- mined using the Recoil-Distance Doppler Shift experiment at INFN, Labo- ratori Nazionali di Legnaro. Excited states in 102Pd were populated by the 92Zr(13C,3n)102Pd fusion-evaporation reaction. Lifetimes were deduced using the Differential Decay Curve method and the corresponding B(E2) values were compared to the E(5) critical-point symmetry, and also the U(5) and O(6) limits of the Interacting Boson Model-1. It is evident that 102Pd agrees poorly with the predicted E(5) symmetry but has a very good (and somewhat surprising) agreement with the O(6) limit.


2020 ◽  
Vol 0 (9) ◽  
pp. 16-23
Author(s):  
A. L. Vorontsov ◽  
◽  
I. A. Nikiforov ◽  

The results of an experimental check of the obtained theoretical formulae allowing us to determine the most important parameters of extrusion cartridges with a counterpunch for different hollow radiuses and bottom-most part thicknesses are presented. Characteristics of used tools, geometric parameters of extrusion experiments, strength characteristics of deformed materials and lubricants are described in detail. Both strain-hardening material and strain-unhardening material were studied. Methodology of the theoretical calculations is demonstrated in detail. High accuracy of the obtained design formulae was confirmed.


1967 ◽  
Vol 96 (1) ◽  
pp. 173-176 ◽  
Author(s):  
T.D. Nainan ◽  
K.D. Clausen ◽  
R.L. Kahle

1969 ◽  
Vol 186 (4) ◽  
pp. 1174-1188 ◽  
Author(s):  
J. G. Pronko ◽  
C. Rolfs ◽  
H. J. Maier

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