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

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 Large NaI(Tl) 39 K, 40 K, 42 Ca, 45 Sc, 63 Cu, spectrometer 25,4cmx38 cm 90 Zr, 92 Mo, 100 Mo, g -ray spectra and angular distributions temperature and spin dependence of the GDR width, nuclear shape evolution,

1989-1990, NBI Copenhagen Copenhagen-Milano- Kraków collaboration (since 1989) Jens Gaardhoje, Angela Bracco, Adam Maj HECTOR (High Energy gamma-ray deteCTOR) array : HECTOR - 8 large BaF 2 detectors time 2 10 time 1 10 0 10 counts Zliczenia -1 10 -2 10 -3 10 channel -4 10 22 E lab = 170 MeV fold 5-30 -5 10 18 5 10 15 20 25 E lab = 165 MeV fold 8-30 E g [MeV] E lab = 160 MeV 14  [mb] 10 6 fold 5-7 2 HELENA multiplicity filter (38 small BaF 2 ) 0 10 20 30 40 50 60 l [  ]

Copenhagen-Milano- Kraków collaboration Jens Gaardhoje, Angela Bracco, Adam Maj HECTOR + HELENA excitation energy exclusive experiments differential technique g -ray spectra, angular A. Maj, J.J. Gaardhoje, et al., Nucl. Phys. A571 (1994) 185-220 distributions, spin distributions 162 Yb, 158, 166 Er, temperature dependence of the GDR width, evolution of nuclear shape, limits of nuclear stability , …

Milano-Copenhagen- Kraków collaboration Angela Bracco, Jens Gaardhoje, Adam Maj HECTOR + HELENA + other detectors exclusive experiments at Riso, Legnaro, Strasbourg 108-112 Sn, 143,147 Eu, 170 W, 194 Hg, 272 Hs,… … nuclear shapes and thermal fluctuations, origin of the GDR width, GDR in superheavy nuclei, GDR on superdeformed states, entrance channel effects , … … studies of the exotic nuclear shapes

NPL Seattle, 1989-1990 18 O + 27 Al -> 45 Sc inclusive experiment E lab = 45, 73, 89, 110 MeV l max = 20, 28, 33, 36  First signatures of Jacobi shape transition predictions 0.28 I=27  triaxial 0.24 0.20 0.16 0.12 0.08 0.04 0.00  M. Kicińska -Habior et al., Phys. Lett. 0 5 10 15 20 25 30 35 E [MeV] B308 (1993) 225: Seattle exp. - o Possible signature of the Jacobi  = 0.4, g = -30 shape transition for 45 Sc in the inclusive GDR spectrum E g [MeV] 5 10 15 20 25

NBI Copenhagen, Riso, 1993 18 O + 28 Si -> 46 Ti exclusive experiment, E lab = 98 MeV l max  32  E* = 81 MeV

First signatures of Jacobi shape Seattle transition experiment predictions M. Kicińska -Habior et al., Phys. Lett.  B308 (1993) 225: Seattle exp. - 0.28 I=27  triaxial Possible signature of the Jacobi 0.24 0.20 shape transition for 45 Sc in the 0.16 inclusive GDR spectrum 0.12 0.08 0.04 0.00 0 5 10 15 20 25 30 35  E [MeV]  o  = 0.4, g = -30 0.08 NBI experiment 0.06 g 0.04  5 10 15 20 25 0.02 E g [MeV] 0.4  A. Maj et al, gated with 0.2 Nucl. Phys. A687 (2001) 192: NBI exp. multiplicity 0.0 – Possible signatures of the Jacobi shape transition for 46 Ti in the -0.2 multiplicity gated GDR spectra and -0.4 angular distributions 5 10 15 20 25 30 E g [MeV] Maria Kmiecik International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

IReS Laboratory Strasbourg, ~2000 18 O + 28 Si -> 46 Ti exclusive experiment, • HECTOR – GDR EB IV + HECTOR + EUCLIDES exp. • EUROBALL – discrete transitions • multiplicity filter (spin) • EUCLIDES - light charged particles Maria Kmiecik International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

HECTOR+EUROBALL experiment 105 MeV 18 O + 28 Si  46 Ti* A. Maj et al., Nucl. Phys. A731 (2004) 319c. l max  35  0.12 0.12 E* = 85 MeV high spin low spin multiplicity folds 11-20 fold 2 0.08 0.08 gated fold 2 Y g [arb. units] Y g [arb. units] 5 10 fold 6 folds 11-20 0.04 0.04 4 10 Y g [arb. units] 3 10 0.00 0.00 4 8 12 16 20 24 28 4 8 12 16 20 24 28 2 10 E g [MeV] E g [MeV] low energy component increasing with spin 1 10 4 8 12 16 20 24 E g [MeV] gated with g transitions in 42 Ca residuum 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 equilibrium shape evolution 60 50 40 g 46 Ti 30 20 26 28 29 10 18 30 32 34 10 36 0 0 0.0 0.5 1.0 1.5 Jacobi shape transition  average shape Maria Kmiecik International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

LSD calculations 46 Ti o g = 0 o g = 60 thermal shape g = 0 g = 60 fluctuations + o o Coriolis splitting 0.75 0.75 0.50 I = 28 - 34 P(  , g )  exp(-F(b,g)/T)  2 sin( g +30 o ) 0.50 I = 24 0.25 1.5 0.25 1.0 1.5 o ) 0.5 0 1.0 3 g g + 0.00 ( s o o c )   2 0 0.0 0.5 3 g g + 0.00 ( s o c  2  0.0    g  g   g   g  g av F ( T , I ; , ) / T ( I ; , ) 4 f ( T , I ) f ( , , ) e sin( 3 ) d d GDR GDR Exp. LSD (I = 28-34) LSD (I = 24) with Coriolis Jacobi shape transition and indicated for the first time Coriolis Y g [a. u.] effect A. Maj et al., Nucl. Phys. A731, 319c (2004) 0 5 10 15 20 25 30 35 E g [MeV] Maria Kmiecik International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

Seattle, NPL 1993 GDR and bremsstrahlung experiment 12 C + 24,26 Mg at 6-11 MeV/u M. Kicińska -Habior et al., Acta Phys. Pol. B26 (1995)439-451

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 + 6 LiH + lead) to reduce cosmic background • Si-Ball – p and a detection M. Kicińska -Habior et al., Acta Phys. Pol. B27 (1996)547, J oint Acta Phys. Pol. B28 (1997)219 A rray for gia N t  Isospin mixing investigations res O nance M. Kici ń ska-Habior et al., Acta Phys. Pol. B36 (2005) 1133 S tudies w I th E. Wójcik, M. Kici ń ska-Habior et al., Acta Phys. Pol. B38 (2007) 1469 K =160 Warsaw Maria Kmiecik Cyclotron International Workshop on Acceleration and Applications of Heavy Ions, Warszawa 2011

Nuclear Physics School – Zakopane 1992 Adam Marta

OSAKA, 2000

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

Adam’s PhD students

ADAM – the Mountaineer 0.12 fold 2 0.08 Y g [arb. units] 0.04 0.00 4 8 12 16 20 24 28 E g [MeV] Sidzina – beautiful village, Beskid Mountains, where Adam was born

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