Isobar contributions to the imaginary part of the optical-model potential for finite nuclei - INSPIRE

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Isobar contributions to the imaginary part of the optical-model potential for finite nuclei

1993

31 pages

Published in:

Nucl.Phys.A 551 (1993) 580-610

Published: 1993

DOI:

10.1016/0375-9474(93)90267-2

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Abstract: (Elsevier)

A recently developed non-relativistic method for calculating the nucleon optical-model potential has been employed to evaluate the contributions from isobaric degrees of freedom to the imaginary part of the nucleon optical-model potential. To evaluate the imaginary part of the optical-model potential, we include the contributions from terms to second order in the Brueckner G -matrix with and without the inclusion of isobars Δ. Results for 16 O are presented in this work. The contributions to the imaginary part are given by the two-particle-one-hole (2p1h) and three-particle-two-hole (3p2h) diagrams. The latter contributes at negative energies only and the contribution from isobar intermediate states is rather small. The 2p1h diagram receives significant contributions from isobars at energies near the resonance and above the threshold for the excitation of ΔΔ states. In particular the importance of ΔΔ configurations is rather sensitive to the treatment of short-range correlations. The parameterization of the self-energy in terms of local potentials is discussed. The depletion of the occupation of the single-particle orbits due to nucleon-nucleon correlations and Δ-excitations is evaluated.

References(52)

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[1]

C. Mahaux
,
R. Sartor

- Adv.Nucl.Phys. 20 (1991) 1

[2]

G.J. Wagner

- Prog.Part.Nucl.Phys. 24 (1990) 17

[3]

Distribution of single-particle strength due to short-range and tensor correlations

B.E. Vonderfecht
(
- Washington U., St. Louis and
- Barcelona U., ECM and
- TRIUMF
)
,
W.H. Dickhoff
(
- Washington U., St. Louis and
- Barcelona U., ECM and
- TRIUMF
)
,
A. Polls
(
- Washington U., St. Louis and
- Barcelona U., ECM and
- TRIUMF
)
,
A. Ramos
(
- Washington U., St. Louis and
- Barcelona U., ECM and
- TRIUMF
)

- Phys.Rev.C 44 (1991) R1265-R1268
•
DOI:
- 10.1103/PhysRevC.44.R1265

[4]

Strength function of the d5/2 hole state in Ca-39

et al.

- Phys.Rev.C 39 (1989) 1658-1661
•
DOI:
- 10.1103/PhysRevC.39.1658

[5]

Single-particle strength distributions in Ca-41

et al.

- Phys.Rev.C 39 (1989) 1662-1664
•
DOI:
- 10.1103/PhysRevC.39.1662

[6]

Role of the nuclear surface in a unified description of the damping of single-particle states and giant resonances

- Nucl.Phys.A 371 (1981) 405-429
•
DOI:
- 10.1016/0375-9474(81)90055-5

[7]

Dynamics of the shell model

- Phys.Rept. 120 (1985) 1-274
•
DOI:
- 10.1016/0370-1573(85)90100-0

[8]

Single-particle properties and short-range correlations in nuclear matter

- Nucl.Phys.A 503 (1989) 1-52
•
DOI:
- 10.1016/0375-9474(89)90252-2

[9]

Nuclear matter properties from a separable representation of the Paris interaction

M. Baldo
(
- Catania U. and
- INFN, Catania
)
,
I. Bombaci
(
- Catania U. and
- INFN, Catania
)
,
G. Giansiracusa
(
- Catania U. and
- INFN, Catania
)
,
U. Lombardo
(
- Catania U. and
- INFN, Catania
)
,
C. Mahaux
(
- Liege U.
)

et al.

- Phys.Rev.C 41 (1990) 1748-1761
•
DOI:
- 10.1103/PhysRevC.41.1748

[10]

Correlated basis theory of nucleon optical potential in nuclear matter

S. Fantoni
(
- Illinois U., Urbana
)
,
B.L. Friman
(
- Illinois U., Urbana
)
,
V.R. Pandharipande
(
- Illinois U., Urbana
)

- Nucl.Phys.A 399 (1983) 51-65
•
DOI:
- 10.1016/0375-9474(83)90593-6

[11]

The Nucleon Spectral Function in Nuclear Matter

- Nucl.Phys.A 505 (1989) 267-299
•
DOI:
- 10.1016/0375-9474(89)90374-6

[12]

Dispersion relation approach to the mean field and spectral functions of nucleons in 40 Ca

- Nucl.Phys.A 528 (1991) 253-297
•
DOI:
- 10.1016/0375-9474(91)90090-S

[13]

Microscopic calculation of the optical-model potential for 16 O

- Nucl.Phys.A 496 (1989) 23-44
•
DOI:
- 10.1016/0375-9474(89)90214-5

[14]

Microscopic calculation of the optical-model potential for 40 Ca

- Nucl.Phys.A 510 (1990) 55-69
•
DOI:
- 10.1016/0375-9474(90)90287-V

[15]

Pions and nuclei

T.E.O. Ericson
,
W. Weise

[16]

Quantum many-particle systems

J.W. Negele
,
H. Orland

[17]

Computational nuclear physics II Berlin), in press

H. Müther
,
P.U. Sauer

[18]

The Bonn Meson Exchange Model for the Nucleon Nucleon Interaction

R. Machleidt
(
- Los Alamos and
- UCLA
)
,
K. Holinde
(
- Bonn U.
)
,
C. Elster
(
- Bonn U.
)

- Phys.Rept. 149 (1987) 1-89,
- Phys. Rep. 149 ( 1987) 1-89
•
DOI:
- 10.1016/S0370-1573(87)80002-9

[19]

The Meson theory of nuclear forces and nuclear structure

R. Machleidt
(
- UCLA
)

- Adv.Nucl.Phys. 19 (1989) 189-376

[20]

Investigation of the nucleon-nucleon tensor force in the three-nucleon system

et al.

- Phys.Lett.B 245 (1990) 333-337
•
DOI:
- 10.1016/0370-2693(90)90654-O

[21]

Higher-order terms and the apparent non-convergence of the perturbation expansion for the effective interaction in finite nuclei

- Nucl.Phys.A 148 (1970) 145-180,
- Nucl.Phys.A 196 (1972) 638-639 (erratum)
•
DOI:
- 10.1016/0375-9474(72)90813-5

[21]

M. Hjorth-Jensen
,
E. Osnes
,
H. Müther

- Annals Phys. 213 (1992) 102

[22]

Effects of short-range correlations on the self-energy in the optical model of finite nuclei

- Nucl.Phys.A 539 (1992) 189-208
•
DOI:
- 10.1016/0375-9474(92)90266-M

[23]

Theory of the nuclear shell model

R.D. Lawson

[24]

Converged values of second-order core-polarization diagrams with orthogonalized-plane-wave intermediate states

- Phys.Rev.C 19 (1979) 1063-1082
•
DOI:
- 10.1103/PhysRevC.19.1063

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