scholarly journals Nucleon Pairs Emitted by Negative Pion Capture and Charge-Dependent Nuclear Wave Functions in Light Nuclei

1965 ◽  
Vol 34 (2) ◽  
pp. 234-242 ◽  
Author(s):  
Toshitake Kohmura
Keyword(s):  
Wave Functions ◽  
Light Nuclei ◽  
Negative Pion ◽  
Pion Capture

Negative pion capture on 4He with emission of neutron-proton, neutron-deuteron and neutron-triton pairs

1973 ◽  
Vol 216 (1) ◽  
pp. 145-156 ◽  
Author(s):  
R.J. Barrett ◽  
J. McCarthy ◽  
R.C. Minehart ◽  
K. Ziock
Keyword(s):  
Negative Pion ◽  
Pion Capture

Negative pion capture inHe3

1975 ◽  
Vol 11 (1) ◽  
pp. 266-268 ◽  
Author(s):  
J. McCarthy ◽  
T. Meyer ◽  
R. C. Minehart ◽  
E. A. Wadlinger ◽  
K. O. H. Ziock ◽  
...  
Keyword(s):  
Negative Pion ◽  
Pion Capture

scholarly journals On the quenching of Gamow–Teller strength

1987 ◽  
Vol 65 (6) ◽  
pp. 574-577 ◽  
Author(s):  
J. Rapaport
Keyword(s):  
Cross Sections ◽  
Wave Functions ◽  
Light Nuclei ◽  
Final States ◽  
Excitation Energies ◽  
Intermediate Energies ◽  
Quenching Factor ◽  
Configuration Mixing ◽  
Gamow Teller ◽  
Model Strength

The (p, n) reaction at intermediate energies has been used to measure differential cross sections in light nuclei to final states characterized with a ΔJπ = 1+ transfer (Gamow–Teller (GT) states). Experimental ft values for allowed beta-decay transitions in these nuclei are used to normalize the strength of the GT transitions in units of B(GT). This experimental GT strength is compared with predicted shell–model strength. For p-shell nuclei, the calculated excitation energies of the GT strength using Cohen and Kurath wave functions are in general agreement with the empirical GT distribution. Up to an excitation energy of about 20 MeV, the total experimental and calculated GT strengths are used to obtain the quenching factor, QF = Σ B(GT)exp/Σ B(GT)theor. It is found that QF decreases as the shell gets filled-up. The lowest value seems to occur for single-hole nuclei. This decrease may be explained by configuration mixing not specifically included in the calculations.

Negative pion capture by medium nuclei in the Z ≈ 50 region

1977 ◽  
Vol 285 (3) ◽  
pp. 379-396 ◽  
Author(s):  
V.S. Butsev ◽  
D. Chultem ◽  
Yu.K. Gavrilov ◽  
Dz. Ganzorig ◽  
V. Presperin
Keyword(s):  
Negative Pion ◽  
Medium Nuclei ◽  
Pion Capture

EFFECTS OF STRONG INTERACTIONS AND FINITE NUCLEAR CHARGE RADIUS IN PIONIC ATOMS

1967 ◽  
Vol 45 (10) ◽  
pp. 3313-3318 ◽  
Author(s):  
L. P. Fulcher ◽  
J. M. Eisenberg ◽  
J. LeTourneux
Keyword(s):  
Charge Radius ◽  
Nuclear Charge ◽  
Wave Functions ◽  
Light Nuclei ◽  
Strong Interactions ◽  
Nuclear Charge Radius ◽  
Charged Sphere ◽  
Nuclear Radius ◽  
Nuclear Charge Distribution ◽  
Square Well

For studies involving the interaction of bound pions with the atomic nucleus, it is essential to investigate details of the pionic wave function at the nucleus. These are especially important for the1S orbitals, where both the repulsive strong interaction and the effects of finite nuclear charge radius are important. We present calculations based on the use of a square-well potential to simulate the strong interactions. The nuclear charge distribution is taken to be that of a uniformly charged sphere. The corresponding Schrödinger equation is solved exactly. The square-well radius is taken to be the same as the nuclear radius, and its strength is chosen so as to obtain agreement with the observed 2P−1S energy differences. For light nuclei, the probability of finding the meson in the nucleus is found to be approximately one-fourth to one-half that calculated with conventional hydrogenic wave functions.

Helium-8 production in negative pion capture by carbon and oxygen nuclei

1966 ◽  
Vol 22 (4) ◽  
pp. 487-489 ◽  
Author(s):  
Yu.A. Batusov ◽  
S.A. Bunyatov ◽  
V.M. Sidorov ◽  
V.A. Yarba
Keyword(s):  
Negative Pion ◽  
Pion Capture

Negative pion capture in heterogeneous mixtures of elements

1980 ◽  
Vol 169 (3) ◽  
pp. 423-425 ◽  
Author(s):  
V.M. Abazov ◽  
V.S. Butsev ◽  
D. Chultem ◽  
D. Knotek ◽  
A. Mastalka ◽  
...  
Keyword(s):  
Negative Pion ◽  
Pion Capture
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