RADII OF CLUSTER STATES IN 11B AND 13C

2011 ◽  
Vol 20 (04) ◽  
pp. 915-918 ◽  
Author(s):  
A. S. DEMYANOVA ◽  
A. A. OGLOBLIN ◽  
A. N. DANILOV ◽  
T. L. BELYAEVA ◽  
S. A. GONCHAROV
Keyword(s):  
Molecular Dynamics ◽  
Excited State ◽  
Excited States ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground States ◽  
Angular Range ◽  
Particle Scattering ◽  
Hoyle State ◽  
Cluster States

Differential cross sections of the inelastic deuterons, 3 He and α-particle scattering on 11 B and 13 C at the incident energies ~ 10 - 100 MeV/u were analyzed in the diffraction angular range. It was shown that the excited states 3/2- (8.56 MeV) of 11 B and 1/2- (8.86, 11.08 and 12.5 MeV) of 13 C which are located close to the 2α + t and 3α + n thresholds correspondingly, have the radii enhanced by a factor ~ 1.2 in comparison with those of the ground states. Their values are approximately equal to the value of the 12 C radius in the excited state 7.65 MeV [Formula: see text] (Hoyle state) and are close to predictions of different versions of antisymmetrized molecular dynamics (AMD) model.

Investigation of exotic states of 13C at low energy

2018 ◽  
Vol 27 (03) ◽  
pp. 1850025 ◽  
Author(s):  
N. Burtebayev ◽  
D. M. Janseitov ◽  
Zh. Kerimkulov ◽  
Y. S. Mukhamejanov ◽  
M. Nassurlla ◽  
...  
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Low Energy ◽  
Neutron Halo ◽  
Differential Cross Sections ◽  
Hoyle State ◽  
Exotic States ◽  
Diffraction Model

The differential cross-sections of the elastic and inelastic [Formula: see text]C scattering have been measured at E[Formula: see text][Formula: see text]MeV. The radii of the exited states: 3.09 [Formula: see text] and 8.86 [Formula: see text] MeV were determined using the Modified Diffraction Model. The radii of these excited states are larger than that of the ground state of [Formula: see text]C, confirming the suggestion that the 8.86 [Formula: see text] MeV state could be an analog of the Hoyle state in [Formula: see text]C and the 3.09 [Formula: see text] MeV state has a neutron halo. The possibility of coexistence of various exotic states in the structure of the [Formula: see text]C nucleus is shown.

scholarly journals The cluster states in light nuclei

2018 ◽  
Vol 194 ◽  
pp. 06003 ◽  
Author(s):  
N. Burtebayev ◽  
D.M. Janseitov ◽  
Zh. Kerimkulov ◽  
Y. Mukhamejanov ◽  
M. Nassurlla ◽  
...  
Keyword(s):  
Root Mean Square ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Light Nuclei ◽  
Differential Cross Sections ◽  
Mean Square ◽  
Hoyle State ◽  
Cluster States ◽  
Diffraction Model

The differential cross-sections of the elastic and inelastic α +11B scattering was measured at E(α) = 29 MeV. The analysis of the data by Modified Diffraction Model (MDM) showed that the root-mean- square (RMS) radius of the 11B state 3/2-, E* = 8.56 MeV is ~ 0.5 fm larger than that of the ground state. It is found that the radius of 3/2- (8.56 MeV) state in the 11B nucleus is close to the radii of the Hoyle state in 12C.

scholarly journals Photophysics of a copper phenanthroline elucidated by trajectory and wavepacket-based quantum dynamics: a synergetic approach

2017 ◽  
Vol 19 (30) ◽  
pp. 19590-19600 ◽  
Author(s):  
G. Capano ◽  
T. J. Penfold ◽  
M. Chergui ◽  
I. Tavernelli
Keyword(s):  
Molecular Dynamics ◽  
Excited State ◽  
Excited States ◽  
Ground State ◽  
Quantum Dynamics ◽  
Equilibrium Processes ◽  
Valuable Method ◽  
Non Equilibrium

On-the-fly excited state molecular dynamics is a valuable method for studying non-equilibrium processes in excited states and is beginning to emerge as a mature approach much like its ground state counterparts.

Three-center cluster states in 11C and 11B

2006 ◽  
Vol 21 (31n33) ◽  
pp. 2403-2409
Author(s):  
Yoshiko Kanada-En'yo
Keyword(s):  
Experimental Data ◽  
Molecular Dynamics ◽  
Excited States ◽  
Cluster State ◽  
Cluster Structure ◽  
Cluster States ◽  
Spin Parity ◽  
Variational Calculations

Structures of excited states in 11 C and 11 B were studied based on variational calculations after spin-parity projection in a framework of antisymmetrized molecular dynamics (AMD). The calculations systematically reproduce experimental data of the transition strengths such as Gamov-Teller(GT) and M1 transitions. A well-developed cluster structure of 2α+3 He (t) was found in the [Formula: see text] state of 11 C (11 B ). We assigned this state to the observed [Formula: see text] state at 8 MeV. The calculations reproduce the small [Formula: see text] which has been measured in the recent experiments. It was found that the [Formula: see text] state has a dilute cluster state, and its features are similar to those of the [Formula: see text] which is considered to be a gas state of three α clusters.

scholarly journals The Angular Distribution of 1·79 MeV Neutrons Scattered from Helium

1963 ◽  
Vol 16 (2) ◽  
pp. 185 ◽  
Author(s):  
PG Young ◽  
GG Ohlsen ◽  
PL Okhuysen
Keyword(s):  
Angular Distribution ◽  
Cross Sections ◽  
Differential Cross ◽  
Phase Shifts ◽  
Differential Cross Sections ◽  
Angular Range

The angular distribution of 1�79 �O� 05 Me V neutrons scattered from 'He has been measured in an effort to settle" a discrepancy in the phase shifts. The laboratory angular range 25� to 135� was covered. The results are compared with differential cross sections computed from the phase shifts of Dodder and Gammel (1952) and Demanins et al. (1962), and the data are seen to agree best with the former.

scholarly journals Nonadiabatic excited-state molecular dynamics: On-the-fly limiting of essential excited states

2016 ◽  
Vol 481 ◽  
pp. 84-90 ◽  
Author(s):  
Tammie Nelson ◽  
Artem Naumov ◽  
Sebastian Fernandez-Alberti ◽  
Sergei Tretiak
Keyword(s):  
Molecular Dynamics ◽  
Excited State ◽  
Excited States

THE SCATTERING OF PROTONS ON 7Li, 9Be, AND 12C AT 100 MEV

1966 ◽  
Vol 44 (12) ◽  
pp. 2961-2971 ◽  
Author(s):  
S. K. Mark ◽  
P. M. Portner ◽  
R. B. Moore
Keyword(s):  
Angular Distribution ◽  
Inelastic Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Target Nucleus ◽  
Energy Region ◽  
Angular Distributions ◽  
Angular Range ◽  
Existing Data ◽  
Octupole Excitation

Elastic and inelastic scattering of protons on 7Li, 9Be, and 12C have been studied, using the 100-MeV proton beam from the McGill synchrocyclotron. Differential cross sections for the various groups of scattered protons were measured over an angular range of 5° to 90° (lab). For proton groups resulting from a quadrupole excitation in the target nucleus, the angular distribution was found to increase at scattering angles less than 10°. Angular distributions corresponding to an octupole excitation were observed to decrease at small angles. The results have been compared with existing data in this energy region.

scholarly journals Electron Scattering from the Ground and Excited States of Barium

1999 ◽  
Vol 52 (3) ◽  
pp. 603
Author(s):  
Dmitry V. Fursa
Keyword(s):  
Excited States ◽  
Electron Scattering ◽  
Cross Sections ◽  
Differential Cross ◽  
Ground State ◽  
Differential Cross Sections ◽  
Close Coupling ◽  
Angular Correlations ◽  
Electron Photon ◽  
Good Agreement

We have used the nonrelativistic convergent close-coupling (CCC) method to investigate electron scattering from the ground (6s2)1S state and excited (6s6p)1 Po1 and (6s5d)1,3De2 states of barium. For the scattering from the barium ground state, we have found very good agreement with measurements of (6s6p)1 Po1 apparent cross sections at all energies. Similarly, good agreement is found for differential cross sections for elastic scattering and (6s6p)1 Po and (6s5d)1 De2 excitations and with the (6s6p)1 Po1 state electron{photon angular correlations. For the scattering from excited states of barium we have found good agreement with elastic (6s6p)1 Po1 scattering and the (6s5d)1De2 → (6s6p)1 Po1 transition for both differential cross sections and electron–photon angular correlations.

scholarly journals PRODUCTION OF α-PARTICLE CONDENSATE STATES IN HEAVY-ION COLLISIONS

2011 ◽  
Vol 20 (04) ◽  
pp. 902-905 ◽  
Author(s):  
◽  
Ad. R. RADUTA ◽  
B. BORDERIE ◽  
N. LE NEINDRE ◽  
P. NAPOLITANI ◽  
...  
Keyword(s):  
Excited State ◽  
Nuclear Reaction ◽  
Excited States ◽  
Heavy Ion Collisions ◽  
Heavy Ion ◽  
Hoyle State ◽  
Α Decay ◽  
Ion Collisions

The fragmentation of quasi-projectiles from the nuclear reaction 40Ca+12C at 25 MeV/nucleon was used to produce excited states candidates to α-particle condensation. The experiment was performed at LNS-Catania using the CHIMERA multidetector. Accepting the emission simultaneity and equality among the α-particle kinetic energies as experimental criteria for deciding in favor of the condensate nature of an excited state, we analyze the [Formula: see text] and [Formula: see text] states of 12 C and the [Formula: see text] state of 16 O . A sub-class of events corresponding to the direct 3-α decay of the Hoyle state is isolated.

Sign in / Sign up

Export Citation Format

Share Document