Nucleon transfer reaction in low energy a 6 he collisions and continuum structures of 10 be
This presentation is the property of its rightful owner.
Sponsored Links
1 / 15

Nucleon transfer reaction in low-energy a + 6 He collisions and continuum structures of 10 Be PowerPoint PPT Presentation


  • 53 Views
  • Uploaded on
  • Presentation posted in: General

Nucleon transfer reaction in low-energy a + 6 He collisions and continuum structures of 10 Be. Unified studies from the nuclear structures and the nuclear reactions. M. Ito , K. Yabana Institute of Physics, University of Tsukuba K. Kato Div. of Phys., Grad. Sc. of Sci., Hokkaido Univ

Download Presentation

Nucleon transfer reaction in low-energy a + 6 He collisions and continuum structures of 10 Be

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Nucleon transfer reaction in low energy a 6 he collisions and continuum structures of 10 be

Nucleon transfer reaction in low-energy a+6He collisions and continuum structures of 10Be

Unified studies from the nuclear structures and the nuclear reactions

M. Ito, K. Yabana

Institute of Physics, University of Tsukuba

K. Kato

Div. of Phys., Grad. Sc. of Sci., Hokkaido Univ

K. Ikeda

Institute of physical and chemical research, RIken


Introduction

Ex.

Introduction

g.s.

  • Cluster structure (N=Z)

    8Be = 2a, 12C = 3a, 20Ne = a+16O

  • Clusters + Valence neutrons

    Be = 2a+Xn : Molecular Orbital

    C = 3a+Xn : Linear chain, D3h Symmetry

    N. Itagaki et al.

    Ne = a+16O+Xn : l=3 deformation

    W. von. Oertzen


Dynamics in the two cores xn system

Dynamics in the Two cores + XN system

ER, G

Collisions

s (E), ds/dW

Decays

Res.

Breakup

Excitations

Nuclear Reactions

G.S.

Should be combine !!

Nuclear Structures


Be isotopes a a n n

Be isotopes( a + a + n + n +…. )

  • Low-lying states : Molecular Orbital

10Be = (p-)2

12Be = (p-)2 (s+)2

p-

s+

Clustering !!

  • Resonant states : 6He or 8He ??

  • Be → He + He

  • M. Freer et al.

  • Saito et al.

    a+6He collisions

    R. Raabe et al.

10Be=a +6He

12Be=6He+6He


Our approach 10 be a a n n

Our approach ( 10Be=a+a+n+n )

  • Description of the internal and asymptotic states

    Generalized Two-center Cluster Model (GTCM)

  • Resonance parameters in compound system

    Absorbing-kernels in Generator Coordinate (AGC)

    ( Absorbing Boundary Condition )

  • Reaction cross section

    Kohn-Hulthen-Kato’s method (KHK)

    ( Incident and exit channels )

A.O.

M.O.

ーi W(R)


Our model 10 be a a n n

OurModel ( 10Be = a + a + n+ n )

I x L = J

L

PJpMK

OR

I

Mol. Orb.

Weak coupling

=

+

+

PJpMK

+

...

+

0Pi (i=x,y,z)


Generalized two center cluster model i

Generalized Two-center Cluster Model ( I )

  • Basis function

    FJpK(n,S) = PJpMK A { fL(a) fR(a) c(n)}S

  • f(a) : a particle, (0s)4 in H.O.

  • c(n) :Neutrons( Left or Right, 0px,0py,0pz )

S


Generalized two center cluster model ii

Generalized Two-center Cluster Model ( II )

  • Total wave function

  • YJp= SS SKnf(n,S,K) FJpK(n,S)

  • = SS GJp(S)

  • Eigenvalue Problem

    <FJpK(n,R) | H – E | YJp> = 0

  • Adiabatic Energy Surfaces

    <FJpK(n,S) | H – E(S) | GJp(S)> = 0

( H = S t i + S v ij )


Adiabatic energy surfaces volkov no2 g3rs

Adiabatic energy surfaces (Volkov No2. + G3RS)

  • Red Dots

[ a + 6He ( I ) ] LJ

a + 6He(01+)

  • Blue Dots

[5He(I1) + 5He (I2)]LJ


Results of gtcm agc for 10 be 0

Results of GTCM + AGC for 10Be(0+)

Energy spectra ( Jp = 0+ )

Adiabatic surfaces (Jp = 0+)


Results of gtcm agc khk for 10 be 0

Results of GTCM + AGC + KHK for 10Be(0+)

(a + 6He) + (5He + 5He) :

6He→01+,21+,02+,22+, 5He→3/2-,1/2-

a+6He(01+) → a+6He(21+)


Crossing of adiabatic surfaces in 10 be

Crossing of adiabatic surfaces in 10Be

Jp = 1- (Pseudo Crossing)

Jp = 0+ (Gradual Coupling)


Coupled ch in adiabatic basis for 10 be 0

Coupled ch. In adiabatic basis for 10Be(0+)

a+6He g.s. Elastic scattering

Adiabatic process is dominant.


Coupled ch in adiabatic basis for 10 be 1

Coupled ch. In adiabatic basis for 10Be(1-)

a+6He g.s. Elastic scattering

Non-adiabatic transition strongly occurs.


Summary and conclusion

Summary and Conclusion

1. Studies on Clustering and the valence nucleons

It is very interesting and important to study the nuclear structures and their enhancements in reactions.

2. GTCM + AGC + KHK

It is possible to study from the point of view of

the nuclear reaction and structures.

3. Applications to 10Be ⇒ Systematic studies !!

Excitation of 03+ and 04+ ⇔ Intrinsic structures

1- ⇒ Non-adiabatic process is dominant due to

the appearance of a + 6He clusters.


  • Login