Ar40(d, p)Excitation Functions Over the Ground-State Isobaric Analog Energy Region

1967 ◽  
Vol 18 (4) ◽  
pp. 130-132 ◽  
Author(s):  
P. Wilhjelm ◽  
G. A. Keyworth ◽  
G. C. Kyker ◽  
D. L. Sellin ◽  
N. R. Roberson ◽  
...  
Keyword(s):  
Ground State ◽  
Energy Region ◽  
Excitation Functions ◽  
Isobaric Analog

scholarly journals Study of sub-barrier fusion of 36S+50Ti,51V systems

2019 ◽  
Vol 223 ◽  
pp. 01013
Author(s):  
Giulia Colucci ◽  
Giovanna Montagnoli ◽  
Alberto M. Stefanini ◽  
Kouichi Hagino ◽  
Antonio Caciolli ◽  
...  
Keyword(s):  
Experimental Data ◽  
Comparative Study ◽  
Excitation Function ◽  
Ground State ◽  
Weak Coupling ◽  
Coupling Scheme ◽  
Excitation Functions ◽  
Coupled Channels ◽  
Barrier Distribution ◽  
Good Agreement

A detailed comparative study of the sub-barrier fusion of the two near-by systems 36S+50Ti,51V was performed at the National Laboratories of Legnaro (INFN). Aim of the experiment was the investigation of possible effects of the non-zero spin of the ground state of the 51V nucleus on the sub-barrier excitation function, and in particular on the shape of the barrier distribution. The results sh w that the two measured excitation functions are very similar down to the level of 20 - 30 μb. The same is observed for the two barrier distributions. Coupled-channels calculations have been performed and are in good agreement with the experimental data. This result indicates that the low-lying levels in 51V can be interpreted in the weak-coupling scheme, that is, 51V(I) = 50Ti(2+)⊗ p(1 f7/2).

Proton Decay of the Isobaric Analog of the Ground State ofPb208Populated by the (p,n) Reaction

1969 ◽  
Vol 22 (14) ◽  
pp. 724-727 ◽  
Author(s):  
G. J. Igo ◽  
C. A. Whitten ◽  
Jean-Luc Perrenoud ◽  
J. W. Verba ◽  
T. J. Woods ◽  
...  
Keyword(s):  
Ground State ◽  
Proton Decay ◽  
Isobaric Analog

scholarly journals Two-proton decay of the 6Be ground state and the double isobaric analog of 11Li

2013 ◽  
Vol 420 ◽  
pp. 012073 ◽  
Author(s):  
R J Charity ◽  
J M Elson ◽  
S Komarov ◽  
L G Sobotka ◽  
J Manfredi ◽  
...  
Keyword(s):  
Ground State ◽  
Proton Decay ◽  
Isobaric Analog

Analysis of fusion excitation functions of 11Be+209Bi and 15C+232Th reaction through quantum diffusion approach

2014 ◽  
Vol 29 (22) ◽  
pp. 1450107 ◽  
Author(s):  
Anju Kumari ◽  
Rajesh Kharab
Keyword(s):  
Cross Section ◽  
Energy Region ◽  
Fusion Cross Section ◽  
Quantum Diffusion ◽  
Excitation Functions ◽  
Barrier Energy ◽  
C Isotopes ◽  
Barrier Region

We have studied the fusion of 11 Be with 209 Bi and 15 C with 232 Th in the energy region around the barrier within the framework of quantum diffusion approach and have found enhancement in fusion cross-section in deep sub-barrier region and a very minor suppression in the above barrier energy region with respect to the corresponding experimental observations. The fusion cross-section is found to be slightly increased for reactions involving 11 Be and 15 C nuclei in comparison to those involving the stable 10 Be and 12 C isotopes, respectively.

Angular Distribution and Excitation Functions of the Be9 (d, p) Be10 Ground-State Reaction

1961 ◽  
Vol 16 (3) ◽  
pp. 367-371 ◽  
Author(s):  
Toshiyuki Ishimatsu ◽  
Naoyuki Takano ◽  
Yûki Hachiya ◽  
Takao Nakashima
Keyword(s):  
Angular Distribution ◽  
Ground State ◽  
Excitation Functions

Excited states of positronium in positron–hydrogen charge exchange

1978 ◽  
Vol 56 (5) ◽  
pp. 565-570 ◽  
Author(s):  
V. S. Kulhar ◽  
C. S. Shastry
Keyword(s):  
Excited States ◽  
Charge Exchange ◽  
Cross Sections ◽  
Ground State ◽  
Born Approximation ◽  
Energy Region ◽  
Hydrogen Charge ◽  
Positronium Formation ◽  
State Approximation ◽  
Higher Excited States

The two state approximation method for the study of the rearrangement collisions is applied to the process of positronium formation in excited states for positron–hydrogen charge exchange collisions. Differential and integrated cross sections are computed for positronium formation in 2S, 2P, and 3S excited states. The results obtained in the energy region 2 to 10 Ry are compared with positronium formation cross sections in ground state. Total positronium formation cross sections including the contributions of capture into all the higher excited states of positronium are also computed in the first Born approximation and the two state approximation in the energy region considered.

The (K−,π−) and (π+, K+) Reactions and Λ-Hypernuclear Polarization

1994 ◽  
Vol 117 ◽  
pp. 17-53 ◽  
Author(s):  
K. Itonaga ◽  
T. Motoba ◽  
M. Sotona
Keyword(s):  
Experimental Data ◽  
Excited States ◽  
Cross Sections ◽  
Ground State ◽  
Weak Decay ◽  
Angular Distributions ◽  
Theoretical Studies ◽  
Excitation Functions ◽  
Unnatural Parity ◽  
Natural Parity

The theoretical studies of (K−, π−) and (π+, K+) reactions on p-shell targets are presented in the DWIA framework with use of the elementary spin-nonflip and spin-flip amplitudes. Calculations can explain the available experimental data of excitation functions and angular distributions of the (K−, π−) reactions at pK−=800 MeV/c and the (π+, K+) reactions at pπ+ = 1.04 GeV/c. Characteristic and distinguished features of the excitation functions and cross sections are exhibited. Especially it is demonstrated that the (K−, π−) reactions at pK−=1.1 GeV/c and 1.5 GeV/c can excite the unnatural parity states with comparable strength to the natural parity ones. Further interesting is that the (π+, K+) and (K−, π−) reactions with ∼1 GeV/c incident beams can be shown to produce very large polarizations of the produced hypernuclear states. Taking the subsequent deexcitation processes of the excited states into account, we have evaluated the hypernuclear polarization and Λ-spin polarization of the ground state and/or the ground-doublet states at the hypernuclear weak-decay stage, which would play a role in the hypernuclear coincidence experiment.

scholarly journals Analogous Gamow-Teller and M1 Transitions in Tz = ±½ Mirror Nuclei and in Tz = ±1, 0 Triplet Nuclei relevant to Low-energy Super GT state

2018 ◽  
Vol 178 ◽  
pp. 05001
Author(s):  
Yoshitaka Fujita ◽  
Hirohiko Fujita ◽  
Yusuke Tanumura
Keyword(s):  
Nuclear Spin ◽  
Ground State ◽  
Degrees Of Freedom ◽  
Main Part ◽  
Low Energy ◽  
Magnetic Interactions ◽  
Isobaric Analog ◽  
Isobaric Analog State ◽  
Electro Magnetic ◽  
Gamow Teller

Nuclei have spin- and isospin-degrees of freedom. Therefore, Gamow-Teller (GT) transitions caused by the στ operator (spin-isospin operator) are unique tools for the studies of nuclear structure as well as nuclear interactions. They can be studied in β decays as well as charge-exchange (CE) reactions. Similarly, M1 γ decays are mainly caused by the στ operator. Combined studies of these transitions caused by Weak, Strong, and Electro-Magnetic interactions provide us a deeper understanding of nuclear spin-isospin-type transitions. We first compare the strengths of analogous GT and M1 transitions in the A = 27, Tz = ±½ mirror nuclei 27Al and 27Si. The comparison is extended to the Tz = ±1, 0 nuclei. The strength of GT transition from the ground state (g.s.) of 42Ca to the 0.611 MeV first Jπ = 1+ state in 42Sc is compared with that of the analogous M1 transition from the 0.611 MeV state to the T = 1, 0+ g.s. (isobaric analog state: IAS) in 42Sc. The 0.611 MeV state has the property of Low-energy Super GT (LeSGT) state, because it carries the main part of the GT strength of all available transitions from the g.s. of 42Ca (and 42Ti) to the Jπ = 1+ GT states in 42Sc.

Sign in / Sign up

Export Citation Format

Share Document