probing nuclear correlations via (ppx) reactionsis very powerful to investigate a s.p. nature of...
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Probing nuclear correlationsvia (p,pX) reactions
Kazuyuki Ogatain collaboration with
Kazuki Yoshida, Kosho Minomo, and Michio Kohno
Research Center for Nuclear Physics (RCNP), Osaka University
n
c
p
c
A
n
p
This work was funded in part by ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan).
1) (p,pN) momentum distribution (MD) as a “probe” of nucleon s.p. MDKO, Yoshida, and Minomo, arXiv:1505.06624 (2015).
2) Microscopic Effective Reaction Theory for (p,pN)
3) Proving multi-nucleon correlations via (p,pX)(p,p): talk by Kazuki Yoshida in this WS.
3NF: K. Minomo, Kohno, Yoshida, and O, in preparation.
Outline
Elastic Breakup / KnockOut
n
B
A
EB KO
・Small energy-momentum transfer・Corresponds to a breakup of a well-
developed cluster state・Relatively strong CC effects (CDCC /
Glauber)
・Large energy-momentum transfer・Corresponds to a breakup/knockout
of a tightly bound nucleon・Relatively weak CC effects (DWIA)
p
n
K
k
K0B
kK0
Ap
n
B
p
p(A, B+n)p
Eikonal (non-adiabatic) DWIA
nK0
Kn
KpA pp
A-rest frame
Phase volume
“Mom. dist.” of nucleon in ADW factor
cf. T. Aumann, Bertulani, Ryckebusch, PRC88, 064610 (2013).
isotropic approx.
B
KB
Exp. data: T. Noro, private communication (2014).
E1 = 250 MeV
1 = 32.5 deg.
12C(p,2p)11Bgs at 392 MeV
Validating the eikonal DWIA
S-factor obtained by (e,e’p) is used.
MD calculation with Eikonal DWIA
MD of B
B
n KBK0
Kn
KpA pp
A-rest frame
PWIA (for analysis)
Phase volume
DW factor
-600 -400 -200 0 200 4000
1
2
3
PB// (MeV/c)
d/d
P B//
[b/
(MeV
/c)]
PMD of 13O for 14O(p,pn)13O at 100 A MeV
DWIA
Sn = 23.2 MeV (0p3/2), S factor = 1
Can we interpret the PMD as the nucleon MD inside 14O?
Pcen
l
PMDmax S
PB//
B
PB⊥
A-rest frame
-600 -400 -200 0 200 4000
10
20
30
PB// (MeV/c)
d/d
P B//
[b/
(MeV
/c)]
Phase volume (PV) effect on the PMD
PWIA
Sn = 23.2 MeV (0p3/2), S factor = 1
・The PV effect gives a cut on the high-mom side resulting in a reduction of .・The PMD height changes little and the integrated PMD decreases significantly.
PB//
B
PB⊥
A-rest frame
w/o w/
Phase volume effect
Ep + En = E0 EB
Ep + En : must be large
Ep + En : can be small
B
n KB
K0
Kn
Kp
Ap
p
B
nKn
Kp p
KB
Positive KB//
Negative KB//
Kp + Kn = K0 KB
A-rest frame
-600 -400 -200 0 200 4000
2
4
PB// (MeV/c)
d/d
P B//
[b/
(MeV
/c)]
Momentum shift due to the distortionSn = 23.2 MeV (0p3/2), S factor = 1
・Attractive (real) potential of B gives the low-momentum tail.・The PMD height changes significantly and the integrated PMD changes little.
A-rest frameDWIAw/o V
Bp
n
V + iW
Mom. Dist. (MD) with Eikonal DWIA
MD of B
B
n KBK0
Kn
KpA pp
A-rest frame
nKn n
Kn(R)
z
VMom. shift toward +z direction
z
1) (p,pN) momentum distribution (MD) as a “probe” of nucleon s.p. MDKO, Yoshida, and Minomo, arXiv:1505.06624 (2015).
Phase volume effect cuts the high-momentum side of the PMD, changing the integrated value of the PMD.
Mom. shift due to an attractive potential by the residue generates the tail on the low-mom. side, changing the height of the PMD.
2) Microscopic Effective Reaction Theory for (p,pN)
Summary
Microscopic description of N-A scatteringproton neutron
・g-matrix folding calculation describes the N-A scattering w/o free parameter.・Distorted waves in (p,pN) are reliably obtained if nuclear density is provided.
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Reduction and ResourceRecycleofHighLevelRadioactiveWasteswith NuclearTransmutation (PM: ReikoFujita)
Extraction genuine data w/ MERTMicroscopic Effective Reaction Theory
・Model space is determined by analysis of alternative reaction data.・Structural information is given by Tsukuba group (or others).・MERT generates the objective reaction data.
A(p,pn)B
A(n,2n)B
from (p,pn) to (n,2n)
n
B
p
B
A
n
p
n
B
n
B
A
n
n
from neutron pickupto neutron capture
A
p d
A(d,p)B
B
A+n → B
n
p
1) (p,pN) momentum distribution (MD) as a “probe” of nucleon s.p. MDKO, Yoshida, and Minomo, arXiv:1505.06624 (2015).
Phase volume effect cuts the high-momentum side of the PMD, changing the integrated value of the PMD.
Mom. shift due to an attractive potential by the residue generates the tail on the low-mom. side, changing the height of the PMD.
2) Microscopic Effective Reaction Theory for (p,pN) is very powerful to investigate a s.p. nature of unstable nuclei. Genuine (n,2n) “data” will be generated from (p,pn) data with MERT.
3) Proving multi-nucleon correlations (3NF effects) via (p,pX)
Summary
Chiral three nucleon force (3NF) effects
M. Kohno, PRC88, 064005 (2013). K. Minomo, Toyokawa, Kohno, Yahiro, PRC90, 051601 (2015).[see also T. Furumoto, Sakuragi, Yamamoto, PRC80, 044614 (2009)]
NN scattering observables in nuclear medium
(p,2p) as a probe of Ch-3NF effect
1) (p,pN) momentum distribution (MD) as a “probe” of nucleon s.p. MDKO, Yoshida, and Minomo, arXiv:1505.06624 (2015).
Phase volume effect cuts the high-momentum side of the PMD, changing the integrated value of the PMD.
Mom. shift due to an attractive potential by the residue generates the tail on the low-mom. side, changing the height of the PMD.
2) Microscopic Effective Reaction Theory for (p,pN) is very powerful to investigate a s.p. nature of unstable nuclei. Genuine (n,2n) “data” will be generated from (p,pn) data with MERT.
3) Proving multi-nucleon correlations (3NF effects) via (p,pX) (p,pN) as a probe of 3NF effect at around the normal density (p,p) as a clean probe of an alpha cluster state [talk by Yoshida (RCNP)]
Other subjects (p,pn) for studying 2n corr. [talks by Uesaka and Kikuchi] (p,pd) as a probe of pn corr. in a nucleus [collab. w/ Yoshida (Niigata)] Probing tensor corr. via (p,d) at higher energies [talk by Ong (RCNP)]
Summary
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