1. Joint LIA COLL-AGAIN, COPIGAL, POLITA WORKSHOP
Collective excitations using proton beam at CCB Krakow - program and preparation measurements
M. Kmiecik
A. Maj1, M. Ciemała1, B. Wasilewska1, M. Ziębliński1, J. Łukasik1, P. Pawłowski1, J. Grębosz1, P. Bednarczyk1, M. Krzysiek1, et al.
F. Crespi2, A. Bracco2, F. Camera2, S. Brambilla2, A. Giaz2, S. Leoni2, et al.
1Institute of Nuclear Physics Polish Academy of Sciences, Kraków 2Milano University and INFN, Milano
Joint LIA COLL-AGAIN, COPIGAL, POLITA WORKSHOP
26-29 April 2016, LNS Catania

2. CYCLOTRON CENTRE BRONOWICE – CCB AT IFJ PAN KRAKÓW
Objective: - proton cancer therapy,
and additionally research program concerning:
nuclear physics,
radiobiology
dosimetry
and medical physics.
Preparation for experiments at CCB IFJ PAN Kraków using inelastic scattering of fast protons
proton cyclotron (Ebeam= MeV)
M. Kmiecik, Piaski 2015

3. LAYOUT OF THE PROTON BEAM DELIVERY SYSTEM
230 MeV proton cyclotron (IBA)
Energy selector
( MeV, Dp/p<0.7%)
Eye-therapy room
Experimental hall
2 gantries for whole body theraphy

4. Letter of intent
The gamma decay from high-lying states and giant resonances excited via (p, p’) at beam MeV
F. Crespi1, M. Kmiecik2,
A. Bracco1, F. Camera1, S. Leoni1, G. Benzoni1, S. Brambilla1, A. Giaz1, L. Pellegri1, O. Wieland1 et al.,
A. Maj2, B. Wasilewska2, P. Bednarczyk2, B. Fornal2, M. Krzysiek2, N. Cieplicka1, K. Mazurek2, M. Ziębliński2, J. Grębosz2, M. Jastrząb2, J. Łukasik2, P. Pawłowski2 et al.
1Milano University and INFN, Milano
2Institute of Nuclear Physics Polish Academy of Sciences, Kraków
Abstract
This letter of intent is for an experimental program at the Krakow Proteus-235 proton cyclotron focusing on the study of the gamma decay from high-lying states below and above the particle binding energy excited via proton inelastic scattering.
The proposed experimental program was accepted by th CCB International Advisory Committee with the highest priority

5. Physics Motivation study of highly excited states in STABLE nuclei Bn
Pygmy
GQR Bn
Pygmy dipole states
(p, p’γ) reaction at Ebeam = MeV
Comparison to the high resolution measurements at other laboratories (RNCP, i-Themba, KVI, HIGS, ELI-NP )
Gamma decay from giant resonances (ISGQR)
(p, p’γ) reaction at Ebeam = MeV 208Pb, 90Zr, 120Sn,….
Measurements of the gamma-branching ratio to test the microscopic structure of ISGQR

6. GAMMA DECAY OF Giant Quadrupole Resonances
not well known
mainly studied by scattered particle measurements (the gamma-decay width is a small fraction (< 10−4) of the total width)
decay to g.s.
to MeV
to MeV
to MeV
g-ray gated spectra
J.Beene et al PRC39(1989)1307
381 MeV 17O on 208Pb target
(p,p’) and (e,e’) experiments
Shevchenko PRL93(2004)
gamma decay measurements needed
Tamii et al., Eur. Phys. J. A50 (2014) 28

7. AVAILABLE INSTRUMENTATION
KRATTA array (Krakow triple telescope array)
35 triple CsI telescopes to measure the energy and angle of inelastically scattered protons
Broad energy range ( MeV for protons)
Energy resolution: 1-2%
Angular resolution: 3.9°
Fully digital ACQ

8. AVAILABLE INSTRUMENTATION
8 large (Φ15cmx20cm) cristals of BaF2
2 MeV < Eγ < 40 MeV
ΔE/E ≈1 0%, Δt < 1 ns
(Milano-Kraków COLLABORATION)
HECTOR array
The HECTOR array arrived from GSI in 2014 (after the campaign)

9. AVAILABLE INSTRUMENTATION IN dedicated campaigns
PARIS demonstrator: 1-4 clusters, each of 9 phoswich Labr3-NaI detectors
1-4 large volume (3.5”x8”) LaBr3 (Krakow, Milano, Krakow-Dubna)

10. GAMMA DECAY OF GQR IN STABLE NUCLEI – IDEA OF THE MEASUREMENT
208Pb(p,p’)
Ep=200MeV
Calculated angular distributions for proton inelastic scattering at 200 MeV from the 208Pb nucleus and corresponding to the excitation of the GQR state at 10.9 MeV
F.E. Bertrand et al., Phys. Rev. C 34, 46 (1986)
F.E. Bertrand et al., Phys. Rev. C 34, 46 (1986)

11. Experimental setup NOTE: the target is in the air p p’ E* target
KRATTA
35 cm
30 cm
448 cm
26 cm
20 cm
40 cm
HECTOR
beam dump
Ti window

12. HecTor-Kratta COINCIDEnce TESt
proton E= 80MeV
12C (graphite) target – 1mm
KRATTA DE - E
proton
exit window 50 µm Ti
target

13. HecTor-Kratta COINCIDEnce TESt
background subtracted
gated on background time
Gate: Egamma=Eexcitation± 2 MeV
gated on coincidence time
E gamma
E proton

14. Gamma and proton Energy spectra
~4.4 MeV
~15 MeV
E g
background subtracted
~4.4 MeV
~15 MeV
E proton
Sn = 18.7 MeV Sp = 15.9 MeV

15. Gamma and proton Energy spectra
~4.4 MeV
~15 MeV
E g
E proton
12.7 MeV
15.1 MeV
4.4 MeV
decay to g.s.
E* [MeV]
~4.4 MeV
~6 MeV
2.4 MeV
3.4 MeV
~4.4 MeV
~15 MeV
~2.4 MeV
8.3 MeV
10.7 MeV
11.7 MeV
3.2 MeV
decay to MeV
~4.4 MeV
~6 MeV
~4.4 MeV
~6 MeV
6.5 MeV
7.5 MeV

16. Experimental setup p @ 85 MeV on Pb TARGET
Planar geometry to cover wider angle range
Plastic SCINTILLATOR in the front of KRATTA – for proton signal in external trigger
FRESCO calculations by Mateusz Krzysiek

17. KRATTA PROTON spectra p @ 85 MeV on Pb 1 3 5 7 2 4 6 8
gates on protons and time
~8 MeV
~14 MeV
~22 MeV
det. #1,2
85 MeV on Pb
~8 MeV
~14 MeV
~22 MeV
det. #3,4
~8 MeV
~22 MeV
~14 MeV
det. #7,8 1 3 5 7 2 4 6 8
E _GQR = 10.6 MeV E_GDR = 13.4 MeV

18. Gamma and proton Energy spectra
~10 MeV
~14 MeV
~7 MeV
~4 MeV
~7 MeV
~4 MeV
~10 MeV
~20 MeV
all KRATTA modules
E proton
Gate: Egamma=Eexcitation± 2 MeV
E g
Sn = 7.4 MeV Sp = 8 MeV

19. g-ray decay to ground state
J.Beene et al PRC39(1989)1307
decay to g.s.
~10 MeV
~14 MeV
~7 MeV
~4 MeV
~6 MeV
[MeV]
quite similar
need to be studied more carefully with better statistic

20. ONGOING work for IMPROVEMENTS
Inserting KRATTA array into the (existing) large vacuum chamber
AND
Adding a multiwire chamber in front of the KRATTA detectors to improve angular resolution (in collaboration with ATOMKI Debrecen)

21. conclusions
New facility CCB with proton beam ( MeV), both for hadron therapy and basic research in nuclear physics becomes operational in Krakow
The experimental program to study the gamma decay of high-lying states and giant resonances excited via (p, p’γ) at proton beam of MeV was prepared and accepted by the International Advisory Committee
First tests of the setup for measurements of the GQR were performed – the results are promising, but some problems need to be solved
IFJ PAN Krakow (together with HIL Warsaw) became a TNA facility within the ENSAR2 program – this will help the international collaboration

23. 2016 zakopane2016.ifj.edu.pl 28 August – 4 September
Nuclear structure at extreme values of spin and isospin
Modern nuclear theory
Collective excitation modes
Decay studies of exotic nuclei
Direct and compound reactions
Nuclear structure in astrophysics
New instrumentation and techniques
Nuclear fusion for energy
zakopane2016.ifj.edu.pl