Topic leaders: W.I. Furman V.N. Shvetsov

Nuclear Physics PAC 20-th sessionApril 1 - 2 2004

Nuclear Physics with Neutrons – Fundamental and applied investigationsNuclear Physics with Neutrons – Fundamental and applied investigations

consideration of the theme consideration of the theme 06-4-1036-2001/200406-4-1036-2001/2004

FINAL REPORT ON THE FINAL REPORT ON THE TOPIC 06-4-1036-2001/2004 TOPIC 06-4-1036-2001/2004

“Nuclear Physics with “Nuclear Physics with Neutrons – Fundamental Neutrons – Fundamental

and Applied Investigations”and Applied Investigations”

Topic leaders: Topic leaders: W.I. FurmanW.I. Furman

V.N. ShvetsovV.N. Shvetsov




Main DirectionsMain Directions Experimental and methodical developments Experimental and methodical developments

planned for planned for high resolutionhigh resolution neutron sources neutron sources

(IREN , nTOF, ORELA, KENS)(IREN , nTOF, ORELA, KENS)

Research focused on Research focused on high fluxhigh flux neutron neutron

sources (IBR-2, HFR/ILL, JAGUAR, PSI, PIK)sources (IBR-2, HFR/ILL, JAGUAR, PSI, PIK)

Applied ResearchApplied Research

Analytical Investigations at the IBR-2 Reactor, Analytical Investigations at the IBR-2 Reactor,

Project REGATAProject REGATA

Total number of published works around 300

130 of them are at reviewed magazines




Scientific Highlights of Scientific Highlights of 2001 – 20042001 – 2004KaTRIn projectKaTRIn project

Development of Neutron Polarizer-Analyzer System Development of Neutron Polarizer-Analyzer System for T-Invariance Experimentfor T-Invariance Experiment

V.R. SkoyV.R. SkoyA1A1, Y. Masuda, Y. MasudaA2A2, S. Muto, S. MutoA3A3, T. Ino, T. InoA3A3, G.N. Kim, G.N. KimA4A4

A1 Frank Laboratory of Neutron Physics, A1 Frank Laboratory of Neutron Physics, JINRJINR

A2 IPNS, Tsukuba, Ibaraki, 305-0801, A2 IPNS, Tsukuba, Ibaraki, 305-0801, JapanJapan

A3 IMSS Tsukuba, Ibaraki, 305-0801, JapanA3 IMSS Tsukuba, Ibaraki, 305-0801, Japan

A4 IHEP, Kyungpook National University, A4 IHEP, Kyungpook National University, KoreaKorea




KaTRIn projectKaTRIn project





Neutron polarization with quartz cell Neutron polarization with sapphire cell

PPHEHE = 54% = 54% PPHEHE = 63% = 63%





Nuclear target polarization. First Nuclear target polarization. First keykey methodical result have methodical result have been obtained recently in collaboration with KENS group: been obtained recently in collaboration with KENS group: Xe gaseous targetXe gaseous target at low pressure was at low pressure was polarized polarized successfullysuccessfully at several percent level. at several percent level.

Next step should be increasing Xe pressure and degree of Next step should be increasing Xe pressure and degree of polarization at acceptable level of relaxation timepolarization at acceptable level of relaxation time

This work is planned for nearest 1,5 yearsThis work is planned for nearest 1,5 years




Parity Violation Effect – Parity Violation Effect – Neutron Spin Rotation and Its ReasonNeutron Spin Rotation and Its Reason

For 204Pb in experiment with polarized thermal neutrons

= (82) 10-5 rad/sm

)( nnk

0Re2

12

fNk

n

Sn

Pn




1n0

IBR-2

HPGe

Pb(n,)204

BGO

BGO

BGO

BGOBGO

BGO

BGO

Pb-shield

BGO

1n0n0

IBR-2

HPGe

Pb(n,)204 Pb(n,)204

BGO

BGO

BGO

BGOBGO

BGO

BGO

Pb-shieldPb-shield

BGO

COmbined COrrelative Spectrometer


)()()()(

EEnEEN nEinni





2

1

22

11)()(

)]([

)]()([2

1

nsE

npEn

sE

E

EENEN

E

EE

n

nn

n

1 – Isotope under investigation (with p-resonance)1 – Isotope under investigation (with p-resonance)

2 – Reference isotope (without p-resonance)2 – Reference isotope (without p-resonance)




Interference effects in the Interference effects in the resonance - neutron induced resonance - neutron induced

fission of fission of 239239PuPu

0 2 4 6 81012141618202224

-0,5

0,0

0,5

1,0

1,5A

0 2 4 6 81012141618202224-1,0

-0,5

0,0

0,5

1,0B

0 2 4 6 810121416182022241E-5

1E-4

1E-3

0,01

0,1

1

10

100

1000

f

LR

FB

J=2

J=1

J=0p-wave x500

s-wave

Energy eV

C

0 1 2-5

-4

-3

-2

-1

0

A

0 2 4 6 8 1012141618202224-0,5

0,0

0,5B

0 2 4 6 8 10121416182022240,01

0,1

1

10

100

1000f

PNC

PNC

p-wave x100

s-wave

Energy eV

C

pnc16may Chi2=123/168




Activity at n_TOF CERNActivity at n_TOF CERN





600000 700000 800000 900000 10000000.00

0.05

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

FIC0 Behrens Meadows Fursov Stein

236 U

/ 23

5 U

En, eV

JINR – IPE – CERN Collaboration

Results of 2003: fine structure of the vibrational fission resonances. Fund. Nucl. Phys.





JINR – IPE – CERN Collaboration

Results of 2003: fission x-session of 232Th, 233-238U, 237Np, 241-243Am and 245Cm for the Thorium cycle and MA incineration in ADS systems. Appl. Nucl. Phys.

All experiments at n_TOF are All experiments at n_TOF are

conducted with total financial conducted with total financial

support of CERNsupport of CERN




Scientific Highlights of Scientific Highlights of 2001 – 20042001 – 2004

UCN physics and neutron opticsUCN physics and neutron optics

• UCN weak upscatteringUCN weak upscattering• Neutron interaction timeNeutron interaction time• Time focusingTime focusing

Direct n-n scattering length Direct n-n scattering length measurementsmeasurements




HEND has 4 signals of neutronsfrom sensors SD, MD, LD and SC/IN, and for each of them the map of orbital measurements is currently produced.

The map of MD sensor is contributed by epithermal neutrons mainly left (top).

This MD map is consistent with the map for epithermal neutrons from Neutron Spectrometer (bottom)

Count rate over the South Pole is 5-10 times lower (blue region) – doubtless water presence

Applied studies




R elative un its

Zn

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk

Novom oskovskSchekino

PlavskBogoroditsk

Arsen’evo

Chern’

Efrem ov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kim ovsk

Volovo

V

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk


PlavskBogoroditsk

Arsen’evo

Chern’

Efrem ov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kim ovsk

Volovo

Ni

Tula

Zaokskiy

A leksin

Suvorov

Belev

Odoev

Yasnogorsk


P lavskBogoroditsk

Arsen’evo

Chern’

E frem ov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

K im ovsk

Volovo

As

Tula

Zaokskiy

Aleksin

Suvorov

Belev

Odoev

Yasnogorsk


PlavskBogoroditsk

Arsen’evo

Chern’

Efrem ov

Uzlovaya

Teploe

Kurkino

Venev

Kireevsk

Kim ovsk

Volovo

Analytical Investigations at the Analytical Investigations at the IBR-2 Reactor Project REGATAIBR-2 Reactor Project REGATA




Priorities for the Future Priorities for the Future Scientific ProgramScientific Program

Fundamental Physics:Fundamental Physics: Symmetries breakingSymmetries breaking in neutron induced in neutron induced

reactions (KaTRIn & POLYANA projects, n-n reactions (KaTRIn & POLYANA projects, n-n scattering)scattering)

Fundamental Fundamental properties of the neutronproperties of the neutron (neutron polarizability, n-e interaction)(neutron polarizability, n-e interaction)

Study of Study of Polarized, AlignedPolarized, Aligned and Unpolarized and Unpolarized Fissioning NucleiFissioning Nuclei Using Polarized and Using Polarized and Unpolarized NeutronsUnpolarized Neutrons

AstrophysicalAstrophysical aspects of neutron physics aspects of neutron physics UCNUCN physics and quantum optics physics and quantum optics




Priorities for the Future Priorities for the Future Scientific ProgramScientific Program

Applied Physics:Applied Physics:

REGATAREGATA project project

Planetary science with neutronsPlanetary science with neutrons

COCOmbined mbined COCOrrelative rrelative SSpectroscopy for pectroscopy for

materials studiesmaterials studies

Topic leaders: W.I. Furman V.N. Shvetsov

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