POPULATION OF ROTATION BANDS IN γ-DECAY OF ANALOG STATES IN 23Na

2009 ◽  
Vol 18 (04) ◽  
pp. 1084-1087
Author(s):  
I. V. USHAKOV ◽  
A. N. VODIN ◽  
G. K. KHOMYAKOV
Keyword(s):  
Proton Beam ◽  
Rotational Bands ◽  
Isobaric Analog ◽  
Nilsson Model ◽  
Mass Nucleus

The γ-decay from [Formula: see text] isobaric analog levels was studied in odd-mass nucleus 23 Na . The investigations were performed using the proton beam at E p = 1623, 1721, 1803 and 1835 keV. It was shown that during γ-decay, mainly low-lying levels of 23 Na are populated; among these levels, we could isolate rotational bands with [Formula: see text] and [Formula: see text], based on the seventh [Formula: see text] and ninth [Formula: see text] orbits of the Nilsson scheme, respectively. The intensities of the M1 transitions were compared with the results of the calculations within the Nilsson model.

Single-proton states in 155Eu

1979 ◽  
Vol 57 (2) ◽  
pp. 271-285 ◽  
Author(s):  
D. G. Burke ◽  
G. Løvhøiden ◽  
O. Straume ◽  
E. R. Flynn ◽  
J. W. Sunier
Keyword(s):  
Cross Sections ◽  
Alpha Particles ◽  
Angular Distributions ◽  
Tandem Accelerator ◽  
Analyzing Powers ◽  
Rotational Bands ◽  
Nilsson Model ◽  
Scientific Laboratory ◽  
Position Sensitive ◽  
Photographic Emulsions

The [Formula: see text] reaction was studied using 17 MeV polarized tritons from the tandem Van de Graaff accelerator at the Los Alamos Scientific Laboratory. The alpha particles were analyzed using a Q3D magnetic spectrometer and detected with a helical-cathode position-sensitive counter. The overall resolution was ~ 18 keV FWHM. Some additional exposures, performed using unpolarized tritons on a thinner target, had a resolution of ~ 12 keV FWHM and were helpful in the interpretation of a number of multiplets. Measurements of the 154Sm(α,t)155Eu reaction were made using 25 MeV alpha beams from the McMaster University tandem accelerator. The triton spectra were analyzed with a magnetic spectrograph using photographic emulsions for detectors, yielding a resolution of ~ 10 keV FWHM. By comparing the measured angular distributions of [Formula: see text] cross sections and analyzing powers with DWBA predictions it was possible to assign spins and parities to many levels. The present results confirm earlier assignments of rotational bands based on the low-lying 5/2+[413], 5/2−[532], and 3/2+[411] orbitals. In addition, states at higher excitation have now been assigned to the 1/2+[411], 1/2+[420], and 7/2+[404] orbitals, and a 3/2+[422] band is tentatively proposed. The spectroscopic strengths can be explained reasonably well by the Nilsson model when pairing and Coriolis mixing effects are included.

Positive-Parity Bands in 29Si

1971 ◽  
Vol 49 (10) ◽  
pp. 1263-1274 ◽  
Author(s):  
A. A. Pilt ◽  
R. H. Spear ◽  
R. V. Elliott ◽  
J. A. Kuehner
Keyword(s):  
Angular Distribution ◽  
Excited State ◽  
Linear Polarization ◽  
Ground State ◽  
Gamma Ray ◽  
Positive Parity ◽  
Rotational Bands ◽  
Mixing Ratios ◽  
First Excited State ◽  
Nilsson Model

A study has been made of several high spin members of the ground state (Kπ = 1/2+) and first-excited state (Kπ = 3/2+) rotational bands in the presumed oblate nucleus 29Si. Gamma-ray angular distribution and linear polarization measurements have confirmed the spin and parity of the 4081 keV level to be 7/2+, and levels at 4742 and 5283 keV have been shown to have Jπ = 9/2+ and (7/2+, 3/2+) respectively. Branching and mixing ratios for the transitions from these states have also been determined; in conjunction with previously measured lifetimes, transition strengths are calculated. The results are compared with the predictions of a Nilsson-model calculation including the effects of coriolis mixing of the low-lying positive parity bands.

Control of proton beam divergence in intense-laser foil-plasma interaction

2006 ◽  
Vol 133 ◽  
pp. 549-551 ◽  
Author(s):  
S. Kawata ◽  
R. Sonobe ◽  
S. Miyazaki ◽  
K. Sakai ◽  
T. Kikuchi
Keyword(s):  
Proton Beam ◽  
Beam Divergence ◽  
Intense Laser ◽  
Plasma Interaction

Complications after Proton Beam Therapy to Skull Base Tumors: Case Series

2019 ◽  
Author(s):  
Gustavo Rangel ◽  
Mostafa Shahein ◽  
Thiago Felicio ◽  
Guilhermo Malave ◽  
Nyall London ◽  
...  
Keyword(s):  
Skull Base ◽  
Proton Beam ◽  
Case Series ◽  
Proton Beam Therapy ◽  
Skull Base Tumors

Proton Beam Therapy for Unresectable Adenoid Cystic Carcinoma of the Skull Base

Skull Base ◽  
2008 ◽  
Vol 18 (S 01) ◽  
Author(s):  
Annie Chan ◽  
Paul Busse ◽  
Urmila Kamat ◽  
Derrick Lin ◽  
Norbert Liebsch
Keyword(s):  
Adenoid Cystic Carcinoma ◽  
Skull Base ◽  
Proton Beam ◽  
Proton Beam Therapy ◽  
Adenoid Cystic

The Deformation Structure of the Nuclei 32S and 36Ar

2017 ◽  
Vol 13 (2) ◽  
pp. 4678-4688
Author(s):  
K. A. Kharroube
Keyword(s):  
Single Particle ◽  
Electric Quadrupole ◽  
Quadrupole Moments ◽  
Moments Of Inertia ◽  
Deformation Structures ◽  
Particle Potential ◽  
Nilsson Model ◽  
Single Particle Potential ◽  
Axes Of Symmetry ◽  
Good Agreement

We applied two different approaches to investigate the deformation structures of the two nuclei S32 and Ar36 . In the first approach, we considered these nuclei as being deformed and have axes of symmetry. Accordingly, we calculated their moments of inertia by using the concept of the single-particle Schrödinger fluid as functions of the deformation parameter β. In this case we calculated also the electric quadrupole moments of the two nuclei by applying Nilsson model as functions of β. In the second approach, we used a strongly deformed nonaxial single-particle potential, depending on Î² and the nonaxiality parameter γ , to obtain the single-particle energies and wave functions. Accordingly, we calculated the quadrupole moments of S32 and Ar36 by filling the single-particle states corresponding to the ground- and the first excited states of these nuclei. The moments of inertia of S32 and Ar36 are then calculated by applying the nuclear superfluidity model. The obtained results are in good agreement with the corresponding experimental data.

Sign in / Sign up

Export Citation Format

Share Document