ADAM

THE PHYSICIST, THE FRIEND, THE MENTOR

Marta Kicińska-Habior

Symposium on the occasion of Angela Bracco and Adam Maj 60th Birthday

14 September, 2015 Kraków

1985-1987, NPL Seattle Kurt Snover’ group

inclusive GDR experiments

39K, 40K, 42Ca, 45Sc, 63Cu, 90Zr, 92Mo, 100Mo,

g-ray spectra and angulardistributions

temperature and spin dependence of the GDR width, nuclear shape evolution,

Large NaI(Tl) spectrometer25,4cmx38 cm

Copenhagen-Milano-Kraków collaboration (since 1989)Jens Gaardhoje, Angela Bracco, Adam Maj

HECTOR (High Energy gamma-ray deteCTOR) array:

0 10 20 30 40 50 60

2

6

10

14

18

22

fold

5-7

fold

8-3

0fold

5-3

0

[

mb

]

Elab

= 170 MeV

Elab

= 165 MeV

Elab

= 160 MeV

l []

5 10 15 20 2510

-5

10-4

10-3

10-2

10-1

100

101

102

Zlicze

nia

Eg [MeV]

HECTOR - 8 large BaF2 detectors

HELENA multiplicity filter (38 small BaF2)

time

channel

co

un

ts

time

1989-1990, NBI Copenhagen

temperature dependence of the GDR width, evolution of nuclear shape, limits of nuclear stability, …

162Yb, 158, 166Er,

g-ray spectra, angulardistributions, spin distributions

excitation energy differential technique

A. Maj, J.J. Gaardhoje, et al., Nucl. Phys. A571 (1994) 185-220

HECTOR + HELENA exclusive experiments

Copenhagen-Milano-Kraków collaborationJens Gaardhoje, Angela Bracco, Adam Maj

…nuclear shapes and thermal fluctuations, origin of the GDR width, GDR in superheavynuclei, GDR on superdeformed states, entrance channel effects, …

… studies of the exotic nuclear shapes

108-112Sn, 143,147Eu, 170W, 194Hg, 272Hs,…

HECTOR + HELENA + other detectorsexclusive experiments at Riso, Legnaro, Strasbourg

Milano-Copenhagen-Kraków collaboration Angela Bracco, Jens Gaardhoje, Adam Maj

M. Kicińska-Habior et al., Phys. Lett. B308 (1993) 225: Seattle exp. -Possible signature of the Jacobi shape transition for 45Sc in the inclusive GDR spectrum

5 10 15 20 25

= 0.4, g = -30o

predictions

I=27

0.00

0.04

0.08

0.12

0.16

0.20

0.24

0.28

0 5 10 15 20 25 30 35

E [MeV]

triaxial

Eg [MeV]

First signaturesof Jacobi shape transition

NPL Seattle, 1989-199018O + 27Al -> 45Scinclusive experiment

Elab = 45, 73, 89, 110 MeVlmax = 20, 28, 33, 36

NBI Copenhagen, Riso, 1993

18O + 28Si -> 46Ti exclusive experiment, Elab = 98 MeVlmax 32 E* = 81 MeV

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

M. Kicińska-Habior et al., Phys. Lett. B308 (1993) 225: Seattle exp. -Possible signature of the Jacobi shape transition for 45Sc in the inclusive GDR spectrum

5 10 15 20 25

= 0.4, g = -30o

predictions

I=27

0.00

0.04

0.08

0.12

0.16

0.20

0.24

0.28

0 5 10 15 20 25 30 35

E [MeV]

triaxial

Eg [MeV]

First signaturesof Jacobi shapetransition

Seattle experiment

A. Maj et al, Nucl. Phys. A687 (2001) 192: NBI exp.– Possible signatures of the Jacobi shape transition for 46Ti in the multiplicity gated GDR spectra and angular distributions

0.02

0.04

0.06

0.08

Thermal shape fluctuations

T = 1 MeV = 2.6 MeV

T = 1 MeV = 2.2 MeV

(

Eg)

5 10 15 20 25 30-0.4

-0.2

0.0

0.2

0.4

Eg [MeV]

A2

NBI experiment

gated with multiplicity

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

IReS Laboratory Strasbourg, ~200018O + 28Si -> 46Ti exclusive experiment,

• HECTOR – GDR

• EUROBALL –discrete transitions

• multiplicity filter (spin)

• EUCLIDES - light charged particles

EB IV + HECTOR + EUCLIDES exp.

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

HECTOR+EUROBALL experiment

4 8 12 16 20 24

101

102

103

104

105

Eg [MeV]

Yg

[arb

. u

nit

s]

fold 2

fold 6

folds 11-20

4 8 12 16 20 24 280.00

0.04

0.08

0.12

Eg [MeV]

Yg [

arb

. u

nit

s]

folds 11-20

high spin

4 8 12 16 20 24 280.00

0.04

0.08

0.12

Eg [MeV]

Yg [

arb

. u

nit

s]

fold 2

low spin

105 MeV 18O + 28Si 46Ti*lmax 35 E* = 85 MeV

low energy component increasing with spin

multiplicity gated

A. Maj et al., Nucl. Phys. A731 (2004) 319c.

gated with g transitionsin 42Ca residuum

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

Jacobi shape transition - theoreticalpredictionspotential energycalculated with LSD (Lublin-Strasbourg Drop) model:Dudek & Pomorski Phys. Rev. C67 (2003) 044316

0

10

20

30

40

50

60

0.0 0.5 1.0 1.5

0

10

18

26 2829

3032 34

36

g46Ti

equilibrium shape evolution

Jacobi shape transition

average shape

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

LSD calculations

thermal shapefluctuations + Coriolis splitting

0 5 10 15 20 25 30 35

Yg [

a. u

.]

Eg [MeV]

Exp. LSD (I = 28-34) LSD (I = 24)

with Coriolis

0.0

0.5

1.0

1.5

0.00

0.25

0.50

0.75

0.0

0.5

1.0

1.5

0.00

0.25

0.50

0.75

I = 28 - 34

g = 0

o

g = 0

o g = 6

0o

2 cos(g+30

o )

2 s

in(g+

30o

)

2 cos(g+30

o )

I = 24

g = 6

0o

P(,g) exp(-F(b,g)/T)

ggg gg ddefITf ITITF

GDR

av

GDR )3sin(),,(),( 4),;(/),;,(

46Ti

Jacobi shape transition and indicated for the first time Coriolis

effect

A. Maj et al., Nucl. Phys. A731, 319c (2004)

Seattle, NPL 1993GDR and bremsstrahlungexperiment

12C + 24,26Mg at 6-11 MeV/u

M. Kicińska-Habior et al., Acta Phys. Pol. B26 (1995)439-451

Maria Kmiecik

International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

GDR studies at HIL,Warszawa

• JANOSIK set-up• 25 cm x 29 cm NaI(Tl)

detector for high-energy g-raymeasurementwith shield (plastic + 6LiH + lead) to reduce cosmicbackground

• Si-Ball – p and a detection

Isospin mixing investigations

M. Kicińska-Habior et al., Acta Phys. Pol. B36 (2005) 1133

E. Wójcik, M. Kicińska-Habior et al., Acta Phys. Pol. B38 (2007) 1469

M. Kicińska-Habior et al., Acta Phys. Pol. B27 (1996)547,

Acta Phys. Pol. B28 (1997)219 JointArray

for giaNtresOnance

StudieswIth

K=160 Warsaw

Cyclotron

Nuclear Physics School– Zakopane 1992Adam Marta

OSAKA, 2000

At Marta’s summer place, Busko 2007

At Adam’s place, Kraków 2008

Adam’s PhD students

ADAM – the Mountaineer

Sidzina – beautiful village, Beskid Mountains,where Adam was born

4 8 12 16 20 24 280.00

0.04

0.08

0.12

Eg [MeV]

Yg [

arb

. u

nit

s]

fold 2

Dear Angela and ADAM

CONGRATULATIONSand

my BEST WISHES

for the future successful years