?????????????3He?????????????????

1
?????????????3He?????????????????

• ???? CNS ????

• ?????
• D-state admixture in 3He
• ??????????
• ??_at_RCNP
• ??3He??
• ????
• ???

2
?????

• ???? CNS
• ????,????,????,????,????,????,????
• ????
• ????,?????,?? ??
• ????
• ????,????,?????,????
• ???? RCNP
• ????,????,???,????
• ???? CYRIC
• ????,????
• ????
• ????

3
Introduction

• 2N potential
• ? Reproduce the deuteron properties (EB, As, D/S,
  Qd, md)
• ? Reproduce the NN data very well with c2/N 1
• Underbind the triton by 0.5 1.0 MeV
• 3N force
• ? Reproduce the triton binding energy
• ? application of Faddeev method to the dp
  elastic scattering
• cross section O.K.
• spin observables ??
• Extensions of 3N force study
• dp breakup
• dp radiative capture
• dp elastic at higher energies
• REVIST the three nucleon BOUND state

4
D-state admixture in 3N system

• Under binding problem of 3N system
• DB B2N - Bexp -0.5 -1.0MeV
• 3N force
• 2N tensor force (at short range)
• D-state admixture in 3N bound state
• PD 10
• 2N tensor and 3N forces

A. Nogga et al., PRC 67, 034004 (2003).
5
D-state admixture in 3He
S-state D-state
S-state
asymptotic region (r8, k0) D/S
ratio exp. -0.0390.004 theory -0.0430.001 This
observable is less sensitive to short-range
behaviors.

• ????????
• S-state ???0MeV/c???
• D-state ?????????
• ??????

by Faddeev??
6
D-state admixture and Polarization

• p-d cluster in 3He
• ??????????3He????????????????
• ???????????????

J.L. Forest et al., PRC 54, 646 (1996).
S-state????? Pp -1/3 Pd
2/3 D-state?????? ??????????
7
??????????
3He(p,pN) 220 and 290 MeV_at_TRIUMF A. Rahav et
al., PRC 46 1167 (1992). E.J. Brash et al., PRC
47 2064 (1993). Cyy k 0 400 MeV/c ????????
20 MeV
3He(p,pN) 197 MeV_at_IUCF M.A. Miller et al., PRL
74 502 (1995). Cyy w 60 100 MeV ????????
gt10 MeV

• ?????????????????????????????????????????!

8
??????

• ??????
• ????????1 MeV
• ????????????????
• 3He????????????????
• ??????? 400MeV
• ???????
• ??????
• gt 500 MeV/c
• ???????????????

9
??_at_RCNP

• ??
• 3He(p,2p)2H, 3He(p,2p)pn
• ??????? 392 MeV
• ???
• ????? ds/dW
• (k 0 300 MeV/c)
• ??????? Cyy
• (k 0, 100 MeV/c)
• ???????
• ??? 50
• ?? 50 nA
• ??3He??
• ??????
• ??? 6 (Max. 10 )
• AFP-NMR?????????
• 3He(p,p)4He??????????

????
10
??_at_RCNP
GR
LAS
??3He??
Scattered proton
Knock out proton
Beam
???????
11
??_at_RCNP
MWDC
To LAS
100 mm
Beam
To GR
MWDC

• MWDC(GR/LAS)
• ? ??????

• 3He ?? 5.4 mg/cm2
• ??? 115 mg/cm2

12
??3He??

• AFP-NMR?
• 2??????
• ?????
• ?????
• 3He(p,p)4He??
• 3He???
• ?? 10.5
• ?? 6.2

LAS?Q?????????? ???????
13
????
14
????
?????
15
????
???????
? ???? ? ???? ?? ????????
?????????????? ?????????? natN???????????? ? N
gas???????
Very preliminary
16
Summary

• D-state admixture in 3N bound state revisited
• under binding problem of light nuclei
• spin dependence of 3N force
• Ep392 MeV????3He(p,2p)????????????????Cyy??????
• 3He????????10.5,????6????
• ?????????????????????????
• Future works
• ?????????????3He???????????????????
• DWIA??????????
• ??????????????