Excitation functions for the two nucleon photoabsorption in Li-6

Grabmayr, P.; Ahrens, J.; Annand, J.R.M.; Anthony, I.; Branford, D.; Cross, G.E.; Davinson, T.; Hall, S.J.; Harty, P.D.; Hehl, T.

doi:10.1016/0370-2693(95)01581-7

Excitation functions for the two nucleon photoabsorption in Li-6

P. Grabmayr
(
- Tubingen U.
)
,
J. Ahrens
(
- Mainz U., Inst. Kernphys.
)
,
J.R.M. Annand
(
- Glasgow U.
)
,
I. Anthony
(
- Glasgow U.
)
,
D. Branford
(
- Edinburgh U.
)

1996

5 pages

Published in:

Phys.Lett.B 370 (1996) 17-21

DOI:

10.1016/0370-2693(95)01581-7

View in:

reference search14 citations

Citations per year

Abstract: (Elsevier)

The 6 Li(γ,np) and 6 Li(γ,pp) reactions have been studied using tagged photons in the range 114 < E γ < 600 MeV. Excitation functions and missing energy spectra are presented. The simple structure of 6 Li and kinematical constraints are exploited to determine the relative importance of the various photoabsorption mechanisms. The genuine two-nucleon absorption can be identified up to photon energies of 500 MeV and is found to be most important at low missing energies. The 6 Li(γ,np) data are well reproduced by predictions of a quasideuteron model.

25.20. Lj
27.20. +n
photon nucleus: nuclear reaction
lithium
photon: tagged beam
tagged beam: photon
emission: (2nucleon)
(2nucleon): emission
energy spectrum: missing-energy
missing-energy: energy spectrum

References(25)

Figures(0)

[1]

The High-energy nuclear photoeffect

J.S. Levinger
(
- Cornell U., Phys. Dept.
)

- Phys.Rev. 84 (1951) 43-51
•
DOI:
- 10.1103/PhysRev.84.43

[2]

K. Gottfried

- Nucl.Phys. 5 (1958) 557

[3]

(gamma, N-2) reaction in C-12

et al.

- Phys.Rev.C 51 (1995) 1967-1976
•
DOI:
- 10.1103/PhysRevC.51.1967

[4]

I.J.D. MacGregor

- Inst.Phys.Conf.Ser. Vol.133 (1993) 93

[5]

M. Gari
,
H. Hebach

- Phys.Rept. 72 (1981) 1

[6]

Dynamics of direct photoemission of proton-neutron pairs

- Nucl.Phys.A 564 (1993) 473-490
•
DOI:
- 10.1016/0375-9474(93)90209-G

[7]

Effects of the final state interaction in (gamma, p n) and (gamma, p p) processes

- Nucl.Phys.A 568 (1994) 828-854
•
e-Print:
- nucl-th/9307004
•
DOI:
- 10.1016/0375-9474(94)90362-X

[8]

( $\gamma$ , $P$ ), ( $\gamma$ , $P N$ ), and ( $\gamma$ , $P P$ ) Reactions on Light Nuclei in the $\Delta(1232)$ Resonance Region

et al.

- Phys.Rev.C 35 (1987) 1828-1843,
- Phys. Rev. C35 ( 1987) 1828-1843
•
DOI:
- 10.1103/PhysRevC.35.1828

[9]

Experimental Study of the Photoemission of Protons Off C-12 Using Tagged Photons in the Energy Range 200-{MeV} to 385-{MeV}

et al.

- Z.Phys.A 298 (1980) 103-111,
- Z.Phys.A298 (1980) 103-111 and Bonn Univ. - BONN-HE-80-07 (80,REC.JUN.) 32p
•
DOI:
- 10.1007/BF01554050

[10]

Design of a tagged photon spectrometer for use with the Mainz 840-MeV microtron

- Nucl.Instrum.Meth.A 301 (1991) 230-240
•
DOI:
- 10.1016/0168-9002(91)90464-2

[11]

H. Herminghaus

- Nucl.Instrum.Meth.A 187 (1981) 103

[11]

H. Herminghaus

[12]

I.J.D. MacGregor

[13]

P. Grabmayr

[14]

Proton photoproduction from C-12

G.E. Cross
(
- Glasgow U. and
- Mainz U., Inst. Phys. and
- Edinburgh U. and
- Tubingen U. and
- Gent U.
)

- Nucl.Phys.A 593 (1995) 463-487
•
DOI:
- 10.1016/0375-9474(95)00318-U

[15]

CERN report

R. Brun
,
M. Hansroul
,
J.C. Lassalle

[16]

THE ABSOLUTE DETECTION EFFICIENCY OF AN NE-213 LIQUID SCINTILLATOR FOR NEUTRONS IN THE ENERGY RANGE 50-MEV - 450-MEV

et al.

- Nucl.Instrum.Meth. 192 (1982) 407-413,
- Nucl. Instrum. Methods 192 ( 1982) 407-413
•
DOI:
- 10.1016/0029-554X(82)90852-7

[17]

unpublished

S. Klein

[18]

Systematics of pion absorption on Li-6

R.D. Ransome
(
- Rutgers U., Piscataway
)
,
V.R. Cupps
(
- Rutgers U., Piscataway
)
,
S. Dawson
(
- Rutgers U., Piscataway
)
,
R.W. Fergerson
(
- Rutgers U., Piscataway
)
,
A. Green
(
- Rutgers U., Piscataway
)

et al.

- Phys.Rev.C 42 (1990) 1500-1518
•
DOI:
- 10.1103/PhysRevC.42.1500

[19]

Study of (gamma,N N) reactions at MAMI

A2

Collaboration

•

T. Hehl
(
- Tubingen U., Math. Inst.
)

for the collaboration.

- Prog.Part.Nucl.Phys. 34 (1995) 385-386,
•
DOI:
- 10.1016/0146-6410(95)00034-G

[20]

Interaction of Real Photons With Nuclei From 100-{MeV} to 500-{MeV}

R.C. Carrasco
(
- Valencia U.
)
,
E. Oset
(
- Valencia U.
)

- Nucl.Phys.A 536 (1992) 445-508,
- Valencia Univ. - IFIC-89-26 (89,rec.Feb.90) 79 p. Valencia Univ. - FTUV 89-14 (89,rec.Feb.90) 79 p,
- Nucl. Phys. A536 (1992) 445-508 and Valencia Univ. - IFIC-89-26 (89,rec.Feb.90) 79 p
•
DOI:
- 10.1016/0375-9474(92)90109-W

[21]

H-2 (gamma, p) n cross section between 20 and 440 MeV

David A. Jenkins
(
- Virginia Tech.
)
,
P.T. Debevec
(
- Unlisted and
- Illinois U., Urbana
)
,
P.D. Harty
(
- Glasgow U.
)

- Phys.Rev.C 50 (1994) 74-83
•
DOI:
- 10.1103/PhysRevC.50.74

[22]

P. Grabmayr

[23]

V.I. Kukulin

- Nucl.Phys.A 513 (1990) 221

[24]

The quasi-deuteron photodisintegration process in lithium, carbon and calcium

- Nucl.Phys.B 1 (1967) 483-493
•
DOI:
- 10.1016/0550-3213(67)90003-X