Average angular momentum in compound nucleus reactions deduced from isomer ratio measurements

1997 ◽  
Vol 55 (2) ◽  
pp. 766-774 ◽  
Author(s):  
O. A. Capurro ◽  
D. E. DiGregorio ◽  
S. Gil ◽  
D. Abriola ◽  
M. di Tada ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Compound Nucleus ◽  
Isomer Ratio ◽  
Average Angular Momentum

Analysis of 134Cs Isomer Ratios in the Fission of 237Np with Protons in the Energy Range 20–85 MeV

1972 ◽  
Vol 50 (12) ◽  
pp. 1877-1881 ◽  
Author(s):  
C. L. Rao ◽  
L. Yaffe
Keyword(s):  
Angular Momentum ◽  
Energy Range ◽  
Root Mean Square ◽  
Compound Nucleus ◽  
Direct Interaction ◽  
Isomer Ratio ◽  
Mean Square ◽  
Fission Process ◽  
Compound Nucleus Formation ◽  
Bombarding Energy

An analysis has been made of the isomer ratio, σm/((σm + σg) for 134Cs isomers formed in the fission of 237Np by protons of energies 20–85 MeV. Compound nucleus formation was assumed up to a bombarding energy of 50 MeV, with direct interaction as the mechanism at higher energies. Values of the root-mean-square angular momentum of [Formula: see text] at 20 MeV and [Formula: see text] at 60–85 MeV bombarding energy agree with the experimental results. The results are consistent with the hypothesis that angular momentum is generated in the fission process.

scholarly journals THE AVERAGE ANGULAR MOMENTUM IN HEAVY-ION INDUCED FUSION REACTION BY OFF-LINE γ TECHNIQUE

1996 ◽  
Vol 45 (5) ◽  
pp. 754
Author(s):  
QIAN XING ◽  
JIANG DONG-XING ◽  
LIN JUN-SONG ◽  
LIU DA-MING ◽  
LI ZE
Keyword(s):  
Angular Momentum ◽  
Fusion Reaction ◽  
Heavy Ion ◽  
Average Angular Momentum

scholarly journals Perturbation dynamics in Keplerian flow under external stochastic forcing

2020 ◽  
Vol 492 (4) ◽  
pp. 5366-5376 ◽  
Author(s):  
D N Razdoburdin
Keyword(s):  
Reynolds Number ◽  
Angular Momentum ◽  
Momentum Transfer ◽  
Reynolds Numbers ◽  
Stochastic Forcing ◽  
Stochastic Force ◽  
Angular Momentum Transfer ◽  
Linear Perturbations ◽  
Average Angular Momentum ◽  
Astrophysical Flows

ABSTRACT We investigate the dynamics of linear perturbations in Keplerian flow under external stochastic force. To abstract from the details of flow structure and boundary conditions, we consider the problem in the shearing box approximation. An external force is assumed to have zero mean, even so, induced perturbations form a steady state, which provides angular momentum transfer to the periphery of the flow. The most effective scenario is based on the transient amplification of induced vortices with the following emission of a shearing sound wave, wherein the maximum of the flux linearly depends on Reynolds number. Thus such a mechanism is significant for astrophysical flows, for which enormous Reynolds numbers are typical. At the same time, addressing the problem analytically, we find that for incompressible fluid in the shearing box approximation stochastic forcing does not lead to average angular momentum transfer. Thus the compressibility of the fluid plays an important role here, and one cannot neglect it.

Angular momentum limitation of cluster emission from the compound nucleus: 16O(16O, α)28Si and 16O(16O, 8Be)24Mg

1987 ◽  
Vol 199 (2) ◽  
pp. 166-170 ◽  
Author(s):  
J. Czakanski ◽  
W. Zipper ◽  
W. Dünnweber ◽  
W. Hering ◽  
D. Konnerth ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Compound Nucleus ◽  
Cluster Emission

Compound nucleus fission at high angular momentum studied in the reactionXe132+Si30

1980 ◽  
Vol 22 (2) ◽  
pp. 546-552 ◽  
Author(s):  
H. Oeschler ◽  
H. Freiesleben ◽  
K. D. Hildenbrand ◽  
P. Engelstein ◽  
J. P. Coffin ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Compound Nucleus ◽  
High Angular Momentum

scholarly journals MECHANISMS PRODUCING FISSIONLIKE BINARY FRAGMENTS IN HEAVY ION COLLISIONS

2010 ◽  
Vol 19 (05n06) ◽  
pp. 997-1008 ◽  
Author(s):  
AVAZBEK NASIROV ◽  
GIORGIO GIARDINA ◽  
GIUSEPPE MANDAGLIO ◽  
MARINA MANGANARO ◽  
AKHTAM MUMINOV
Keyword(s):  
Angular Momentum ◽  
Cross Section ◽  
Compound Nucleus ◽  
Quantitative Estimation ◽  
Fusion Cross Section ◽  
Heavy Ion ◽  
Partial Cross Section ◽  
Complete Fusion ◽  
Dinuclear System ◽  
Mass Distributions

The mixing of the quasifission component to the fissionlike cross section causes ambiguity in the quantitative estimation of the complete fusion cross section from the observed angular and mass distributions of the binary products. We show that the partial cross section of quasifission component of binary fragments covers the whole range of the angular momentum values leading to capture. The calculated angular momentum distributions for the compound nucleus and dinuclear system going to quasifission may overlap: competition between complete fusion and quasifission takes place at all values of initial orbital angular momentum. Quasifission components formed at large angular momentum of the dinuclear system can show isotropic angular distribution and their mass distribution can be in mass symmetric region similar to the characteristics of fusion-fission components. As result the unintentional inclusion of the quasifission contribution into the fusion-fission fragment yields can lead to overestimation of the probability of the compound nucleus formation.

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