Coulomb excitation of the neutron-rich 67,69,71,73 Cu with Miniball and REX-ISOLDE

Coulomb excitation of the neutron-rich Coulomb excitation of the neutron-rich 67,69,71,7367,69,71,73Cu Cu with Miniball and REX-ISOLDEwith Miniball and REX-ISOLDE

Experiment IS435Experiment IS435

Irina Stefanescu1, O. Ivanov1, J. Van de Walle1, N. Patronis1, D. Pauwels1, T. E. Cocolios1, N. Bree1, M. Huyse1, P. Van Duppen1

G. Georgiev2, T. Kröll3, P. Maierbeck3, A. Blazhev4, N. Warr4, S. Franchoo5, J. Iwanicki6, P. Napiorkowski6, K. Wrzosek6, D. Balabanski7, K. Gladnishki7, G. Rainovski7,

G. Lo Bianco8, N. Blasi8, A. Lagoyannis9, T. Konstantinopoulos9, A. Ekström10

1IKS, KU Leuven2CSNSM Orsay, France

3TU München, Germany4IKP Köln, Germany

5IPN Orsay, France6Heavy Ion Laboratory, Warsaw University, Poland

7University of Sofia, Bulgaria8Universita di Camerino, Italy

9National Research Center Demokritos, Greece10Lund University, Sweden

Funded by IAP Belgium, BMBF, EURONS

Beyond 68Ni by Coulomb excitation with RIBs

measured by Coulex with RIBs

g9/2

28

neutronsprotons

g9/2

f7/2

f5/2

40

p3/2

p1/2

“monopole migration”

67,69,71,7367,69,71,73Cu and the monopole migrationCu and the monopole migration

3/2-

1/2-

5/2-

7/2-

69Cu40

3/2-

5/2-

1/2-

7/2-

67Cu38

p3/2

f5/2

p1/2

p3/22+ (A-1Ni)

7/2-(f7/2)-17/2-

(3/2-)

(5/2-)

(7/2-)

73Cu44

(7/2-)

(3/2-)

(5/2-)

(7/2-)

71Cu42

(7/2-)

g9/2

Eex (M

eV)

0

1

2

67,69Cu: B. Zeidman et al., PRC 18, 2122(1978). 71Cu: R. Grzywacz et al., PRL 81, 766 (1998).

69,71,73Cu: S. Franchoo et al., PRL 81, 3100(1998).

67,69,71,7367,69,71,73Cu and the monopole migrationCu and the monopole migration

67,69Cu: B. Zeidman et al., PRC 18, 2122(1978). 71Cu: R. Grzywacz et al., PRL 81, 766 (1998).

69,71,73Cu: S. Franchoo et al., PRL 81, 3100(1998).

3/2-

1/2-

5/2-

7/2-

69Cu40

3/2-

5/2-

1/2-

7/2-

67Cu38

p3/2

f5/2

p1/2

p3/22+ (A-1Ni)

7/2-(f7/2)-17/2-

(3/2-)

(5/2-)

(7/2-)

73Cu44

Eex (M

eV)

0

1

2

(7/2-)

(3/2-)

(5/2-)

(7/2-)

71Cu42

(7/2-)

g9/2

1.9

0.3

0.26

0.9

3.1

1.3

0.46

1.5

2.7

0.45

SFSF

Radioactive beams of Radioactive beams of 67,69,71,7367,69,71,73CuCu

UCx target – Ta line

ionized by RILIS

REX: ~2.95 MeV/u

beams contaminated with the Ga isobar

laser ON/OFF runs 67Cu/total~ 98 %

69Cu/total~ 94 %

71Cu/total~ 76 %

73Cu/total~ 19 %

104Pd

104Pd

69Cu

1/2-

5/2-

7/2-

67Cu

5/2-

1/2-

7/2-

Experimental results (1)Experimental results (1)

3/2-

5/2-

1/2-

7/2-

7/2-

67Cu38

69Cu403/2-

5/2-

1/2-

7/2-

7/2-

DC for A=67

DC for A=69

2340

1670

1170

1115

1096

1213

1711

1871

(f7/2)-1

(f7/2)-1

p3/22+ (66Ni)

p3/22+ (68Ni)

71Cu(1/2-)5/2-

120Sn


104Pd

7/2-

71Cu

71Ga

(1/2-)454 keV

(3/2-)

(5/2-)

(1/2-)

(7/2-)

(7/2-)

71Cu42

DC for A=71

DC for A=71

454

534

981

1190

(f7/2)-1

p3/22+ (70Ni)


73Cu

73Ga

Laser ON

Laser OFF(3/2-)

(5/2-)

(1/2-)

(7/2-)

(7/2-)

73Cu44

DC for A=73

120Sn

7/2-

135

166

961

1010

(1/2-)

5/2-

(f7/2)-1

p3/22+ (72Ni)

Experimental results (preliminary)Experimental results (preliminary)

new

spectroscopic factors from B. Zeidman et al., PRC 18, 2122(1978).

Conclusion and outlookConclusion and outlook

Summer 2006 Coulex of 67,69,71,73Cu;

three B(E2) values measured in each isotope;

½- identified in 71,73Cu.

strong effects of the N=40 sub-shell closure on the structure of the odd-mass Cu isotopes;

highly collective 1/2- state and single-particle-like 5/2- level in 69,71,73Cu;

interpreting the implications of the present results requires some theoretical input.

Summer 2007 Coulex of 75Cu

Beyond 68Ni by Coulomb excitation with RIBs

measured by Coulex with RIBs

g9/2

28

neutronsprotons

j> = l+1/2

j> = l’+1/2

j< = l’-1/2g9/2

f7/2

f5/2 40

monopole interaction

protons neutrons

j> = l+1/2

j> = l’+1/2

j< = l’-1/2g9/2

f7/2

f5/2

1.4 GeV proton beam

Miniball

REX-ISOLDEXCu+XGa ~2.95 MeV/u

Resonant laser ionization (RILIS)

Radioactive beams of Radioactive beams of 67,69,71,7367,69,71,73Cu @ISOLDECu @ISOLDE

67Cu: 2% 67Ga

73Cu: 80% 73Ga

UCx target

Experimental set-up for Coulex @REX-ISOLDEExperimental set-up for Coulex @REX-ISOLDE

Miniball

120Sn, 104Pd

REX-ISOLDE

ACuE~2.95 MeV/u

PPACBeam

monitor

DSSD detector

~2 mg/cm2

Beam dump detector

(16o-53o)

v/c ~ 7% Doppler correction of the -rays on an event-by-event mode by using the segmentation of the particle and -detectors.

• 4 quadrants

• 16 annular strips ()

• 24 sector strips ()

Coulomb excitation of the neutron-rich 67,69,71,73 Cu with Miniball and REX-ISOLDE

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