Vlad Avrigeanu / Mihai Mirean_TOF Collaboration Meeting 2006,
Paris, 4-5 Dec. 1 Proposal to the n_TOF Collaboration at CERN on
IFIN-HH joining Activities at the neutron time of flight facility
at CERN Second Phase (n_TOF-Ph2)
http://pceet075.cern.ch/Documents/LoI_2005/n_TOF-Ph2_LoI.pdf n_TOF
Collaboration Meeting 2006 Paris, Dec. 4-5, 2006 Vlad Avrigeanu,
Mihai Mirea Horia Hulubei National Institute for Physics &
Nuclear Engineering, Bucharest, Romania
http://tandem.nipne.ro/~Dante/http://tandem.nipne.ro/~Dante/,
http://fp6.cordis.lu/fp6/partnershttp://fp6.cordis.lu/fp6/partners
Activation reactions: (n,p), (n, ), and (n,xc): V. Avrigeanu, M.
Avrigeanu,R.A. Forrest (UKAEA-Culham) V. Avrigeanu, M. Avrigeanu,
R.A. Forrest (UKAEA-Culham) -particle optical model / nuclear
matter density (T): M. Avrigeanu, V. Avrigeanu, W. von Oertzen
(HMI-Berlin) Measurements of fission cross-sections and neutron
interferometry: M. Petrascu, A. Isbasescu, H. Petrascu, I. Tanihata
(TRIUMF), W.Y. Lynch M. Petrascu, A. Isbasescu, H. Petrascu, I.
Tanihata (TRIUMF), W.Y. Lynch (MSU) New information on the basic
mechanism of nuclear fission: M. Mirea, L. Tassan-Got (IN2P3-Orsay)
INTEREST IN FURTHER MEASUREMENTS Slide 2 Vlad Avrigeanu / Mihai
Mirean_TOF Collaboration Meeting 2006, Paris, 4-5 Dec. 2 Neutron
capture cross section measurements for nuclear astrophysics at
n_TOF Michael Heil on behalf of the n_TOF collaboration Michael
Heil NIC IX, June 2006, Geneva
http://indico.cern.ch/getFile.py/access?contribId=270&sessionId=26&resId=1&materialId=slides&confId=059
Spark for this IFIN-HH proposal Slide 3 Vlad Avrigeanu / Mihai
Mirean_TOF Collaboration Meeting 2006, Paris, 4-5 Dec. 3 Outlook -
Plan for measurements in Phase-2 Michael Heil NIC IX, June 2006,
Geneva Capture measurements Mo, Ru, Pd stable isotopes Fe, Ni, Zn,
and Se (stable isotopes) 63 Ni, 79 Se A150 (isotopes varii) 147
Sm(n, ), 67 Zn(n, ), 99 Ru(n, ), 58 Ni(n,p) r-process residuals
calculation isotopic patterns in SiC grains s-process
nucleosynthesis in massive stars accurate nuclear data needs for
structural materials s-process branching points long-lived fission
products p-process studies n_TOF will continue: Letter of Intent
signed by 24 research labs of the n_TOF Collaboration + 4 newcomers
(January 2005) Spark for this FIN-HH proposal Slide 4 Vlad
Avrigeanu / Mihai Mirean_TOF Collaboration Meeting 2006, Paris, 4-5
Dec. 4 all stable 50,51 V isotopes (+ EC/JRC/IRMM-Geel) [Phys. Rev.
C 65, 014604 (2001) ] all stable 58,60,61,62,64 Ni and 59 Co
isotopes (+ EC/JRC/IRMM-Geel) [Nucl. Phys. A730, 255 (2004)] all
stable 92,94,95,96,97,98,100 Mo isotopes (+ IRMM,
KRI-St.Petersburg) [Nucl. Phys. A705, 265 (2002)] [Phys. Rev. C 71,
044617 (2005)] all stable 180,182,183,184,186 W isotopes (+ KRI,
UKAEA, TUD-Dresden, [ Nucl. Phys. A765, 1 (2006) ] NRC-Petten,
BNL-Brookhaven) all stable 174,176,177,178,179,180 Hf, 181 Ta
isotopes (+ UKAEA, NRC, BNL) [PHYSOR-2006, ] all stable 55 Mn,
63,65 Cu isotopes (+ UKAEA, NRC, BNL) Fast-neutron activation
analysis (IFIN-HH, 2000-2006) Slide 5 Vlad Avrigeanu / Mihai
Mirean_TOF Collaboration Meeting 2006, Paris, 4-5 Dec. 5 i.unitary
use of common model parameters for different mechanisms ii.use of
consistent sets of input parameters - determined by analyses of
various independent experimental data iii.unitary account of whole
body of related experimental data for isotope chains and
neighboring elements [ activation & particle-emission spectra ]
[ enlarged incident-energy range ] YES NO re-normalization or free
parameters Outline of activation consistent model calculations [
E.D. Arthur P.G. Young, LANL, 80 ] [ IAEA/NDS RCs (12), Bucharest,
1982-2005 ] n_TOF-Ph2 Slide 6 Vlad Avrigeanu / Mihai Mirean_TOF
Collaboration Meeting 2006, Paris, 4-5 Dec. 6 e.g. : Isotopic
effects in the (n,p) reaction cross section on Hf and W isotopes [
Isotopic effect on W isotopes: R. Caplar et al., Z. Phys. A 313,
227 (1983) ] Possible reason for actual model overestimation of 181
Ta(n.p) 181 Hf data: actual data: 181 Ta(n.p) 181g Hf unknown
(long-life) isomer 181m Hf [Nucl. Phys. A765, 1 (2006)]
[PHYSOR-2006, D.10.2] Slide 7 Vlad Avrigeanu / Mihai Mirean_TOF
Collaboration Meeting 2006, Paris, 4-5 Dec. 7 Comparison of
measured and calculated 181 Ta(p,xn) reaction cross sections PE
threshold in CP-induced reactions e.g., H.C.Chiang+, Nucl.Phys.
A340,466(1980): PE ~ (1 - V C / E) [ b eff ~ b(1 - V C / E) 1/2 ]
Interest of reaction cross-sections analysis within energy range E
n Vlad Avrigeanu / Mihai Mirean_TOF Collaboration Meeting 2006,
Paris, 4-5 Dec. 13 Almost identical at r >R 7 (surface tail
region): DF (2003) ROP (2003) McFadden-Satchler (1966) V R (R 7
)=-7 MeV [Fernandez-Blair, Phys.Rev. C 1,523(1970)] Surface tail: V
R
