ADAM THE PHYSICIST, THE FRIEND, THE MENTOR Marta Kiciska -Habior - - PowerPoint PPT Presentation

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ADAM THE PHYSICIST, THE FRIEND, THE MENTOR Marta Kiciska -Habior - - PowerPoint PPT Presentation

Oct 31, 2022 222 likes •428 views

ADAM THE PHYSICIST, THE FRIEND, THE MENTOR Marta Kiciska -Habior Symposium on the occasion of Angela Bracco and Adam Maj 60th Birthday 14 September , 2015 Krakw 1985-1987, NPL Seattle Kurt Snover group inclusive GDR experiments Large

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SLIDE 1

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

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SLIDE 2

1985-1987, NPL Seattle

Kurt Snover’ group inclusive GDR experiments

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

g-ray spectra and angular

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

Large NaI(Tl) spectrometer 25,4cmx38 cm

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SLIDE 3

Copenhagen-Milano-Kraków collaboration (since 1989)

Jens Gaardhoje, Angela Bracco, Adam Maj

HECTOR (High Energy gamma-ray deteCTOR) array:

10 20 30 40 50 60 2 6 10 14 18 22 fold 5-7 fold 8-30 fold 5-30

 [mb]

Elab= 170 MeV Elab= 165 MeV Elab= 160 MeV

l []

5 10 15 20 25 10

  • 5

10

  • 4

10

  • 3

10

  • 2

10

  • 1

10 10

1

10

2

Zliczenia Eg [MeV]

HECTOR - 8 large BaF2 detectors HELENA multiplicity filter (38 small BaF2)

time channel counts

time

1989-1990, NBI Copenhagen

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SLIDE 4

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

162Yb, 158, 166Er,

g-ray spectra, angular distributions, 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 collaboration

Jens Gaardhoje, Angela Bracco, Adam Maj

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SLIDE 5

…nuclear shapes and thermal fluctuations,

  • rigin of the GDR width, GDR in superheavy

nuclei, GDR on superdeformed states, entrance channel effects, … … studies of the exotic nuclear shapes

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

HECTOR + HELENA + other detectors exclusive experiments at Riso, Legnaro, Strasbourg Milano-Copenhagen-Kraków collaboration

Angela Bracco, Jens Gaardhoje, Adam Maj

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SLIDE 6

  • 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 = -30

  • predictions

I=27  0.00 0.04 0.08 0.12 0.16 0.20 0.24 0.28 5 10 15 20 25 30 35 E [MeV]

triaxial

Eg [MeV]

First signatures

  • f Jacobi shape transition

NPL Seattle, 1989-1990

18O + 27Al -> 45Sc

inclusive experiment

Elab = 45, 73, 89, 110 MeV lmax = 20, 28, 33, 36 

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SLIDE 7

NBI Copenhagen, Riso, 1993

18O + 28Si -> 46Ti exclusive experiment,

Elab = 98 MeV lmax 32  E* = 81 MeV

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SLIDE 8

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 = -30

  • predictions

I=27  0.00 0.04 0.08 0.12 0.16 0.20 0.24 0.28 5 10 15 20 25 30 35 E [MeV]

triaxial

Eg [MeV]

First signatures

  • f Jacobi shape

transition

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   

g

5 10 15 20 25 30

  • 0.4
  • 0.2

0.0 0.2 0.4 Eg [MeV]

NBI experiment gated with multiplicity

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SLIDE 9

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

IReS Laboratory Strasbourg, ~2000

18O + 28Si -> 46Ti

exclusive experiment,

  • HECTOR – GDR
  • EUROBALL –

discrete transitions

  • multiplicity filter

(spin)

  • EUCLIDES - light

charged particles

EB IV + HECTOR + EUCLIDES exp.

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SLIDE 10

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

HECTOR+EUROBALL experiment

4 8 12 16 20 24 10

1

10

2

10

3

10

4

10

5

Eg [MeV] Yg [arb. units]

fold 2 fold 6 folds 11-20

4 8 12 16 20 24 28 0.00 0.04 0.08 0.12

Eg [MeV]

Yg [arb. units]

folds 11-20

high spin

4 8 12 16 20 24 28 0.00 0.04 0.08 0.12

Eg [MeV]

Yg [arb. units]

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 transitions in 42Ca residuum

slide-11
SLIDE 11

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

Jacobi shape transition - theoretical predictions

potential energy calculated with LSD (Lublin-Strasbourg Drop) model:

Dudek & Pomorski Phys. Rev. C67 (2003) 044316

10 20 30 40 50 60

0.0 0.5 1.0 1.5

10 18 26 28 29 30 32 34 36

g

46Ti

equilibrium shape evolution

Jacobi shape transition

average shape

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SLIDE 12

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

LSD calculations

thermal shape fluctuations + Coriolis splitting

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

  • g = 0
  • g = 60

2

c

  • s

(

g g

+ 3

  • )

2 sin(g+30o)  2

c

  • s

(

g g

+ 3

  • )

I = 24

g = 60

  • P(,g)  exp(-F(b,g)/T)

g  g   g 

g  g 

d d e f I T f

I T I T F GDR av GDR



 ) 3 sin( ) , , ( ) , (

4 ) , ; ( / ) , ; , (

46Ti

Jacobi shape transition and indicated for the first time Coriolis effect

  • A. Maj et al., Nucl. Phys. A731, 319c (2004)
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SLIDE 13

Seattle, NPL 1993

GDR and bremsstrahlung experiment

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

  • M. Kicińska-Habior et al., Acta Phys. Pol. B26 (1995)439-451
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SLIDE 14

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-ray measurement with shield (plastic + 6LiH + lead) to reduce cosmic background

  • 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

Joint Array for giaNt resOnance Studies wIth K=160 Warsaw Cyclotron

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SLIDE 15

Nuclear Physics School– Zakopane 1992

Adam Marta

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SLIDE 16

OSAKA, 2000

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SLIDE 17

At Marta’s summer place, Busko 2007 At Adam’s place, Kraków 2008

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SLIDE 18

Adam’s PhD students

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SLIDE 19

ADAM – the Mountaineer

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

4 8 12 16 20 24 28 0.00 0.04 0.08 0.12

Eg [MeV]

Yg [arb. units]

fold 2

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SLIDE 20

Dear Angela and ADAM CONGRATULATIONS and my BEST WISHES for the future successful years