THEME05-2-1039-2001/2003

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05-2-1039-2001/2003

Priority:

Status:

Approved for completion
in 2003

Investigation of Fundamental Interactions in Nuclei
at Low Energies

Leader:

V.B. Brudanin

Scientific Programme:
Investigation of electron-neutrino angular correlation in nuclear

-decay aimed to obtain new experimental upper limits on the admixture of scalar and tensor interactions to the standard V-A model. Search for neutrinoless double beta decay and wide investigation of two-neutrino

-decay of ¹⁰⁰Mo, ¹⁵⁰Nd, ¹⁰⁶Cd, ⁴⁸Ca, ⁷⁶Ge, and other isotopes in the international experiments NEMO, TGV. Quantitative estimation of new physics phenomena (Supersymmetry, Compositeness, Lepto-quarks, etc.) in cosmology, accelerator physics and rare decays. Investigation of weak and electomagnet properties of neutrons.
Research and development of new cryogenic methods of detection to search for Weak Interacting Massive Particles as candidates for non-baryonic Dark Matter in the Universe. Research and development of new types of semiconductor germanium detectors for future generation of non-accelerator experiments within the framework of the GENIUS and MAJORANA projects. Nuclear spectroscopy of nuclei far from stability; investigation of

- and

-decay aimed to obtain new information of nuclear properties such as bounding energies, masses, coupling energies, etc. Development of new radio-chemical methods of rare nuclide extraction and new types of scintillators. Creation of the experimental setup and investigation of dd, pd and d ³He reactions at ultralow energies by using a Z-pinch.

Expected main results in 2003:

Measurements of the 2 2-decay of ¹⁰⁰Mo. Preparation of the ¹⁰⁰Mo, ⁷⁶Ge and ⁴⁸Ca targets for the NEMO, TGV and MAJORANA experiments.
Measurement of the electron-neutrino correlation in the beta decay of ³²Ar.
Investigation of Si and Ge detector behaviour at a very low temperature (less than 4.2 K). Manufacturing of the cryogenic system for detectors with inner magnification. Measurements with Si detectors.
R&D for the detecting systems on the basis of the semiconductor detectors for GENIUS and MAJORANA.
Methodological investigations on updating the "target-ion-source" unit to increase the yield of short-lived isotopes.
Preparations for manufacturing of radioactive sources. Physical and chemical investigations of rare earth elements by means of the one-detector angular correlation due to gamma-gamma excitation.
Investigation of isomeric states and the structure of excited states at the beginning of the domain of highly deformed rare-earth nuclei (nuclides ^157,159Tm, Ho with A=156,161, Dy with A=156,158,160, ¹⁵²Eu and ¹⁵²Gd).
Development and manufacturing of passive schielding and detecting system for spectrometer GEMMA.
Development, construction and investigation of the properties of the load module of the accelerator at HCEI RAS-SB for formation of the "inverse" deuterium Z-pinch.
Development of the method to measure energy distribution of accelerated liner ions in the "inverse" Z-pinch mode.

List of Activities

Activity or project

Spokespersons

Status

NEMO

V.B. Brudanin
A.A. Smolnikov

Data taking

TGV

V.B. Brudanin
I. Stekl

Data taking

ANCOR

V.G. Egorov

Data taking

LESI

V.M. Bystritsky

Data taking

DETECTOR

V.G. Sandukovsky
V.B. Brudanin

Data taking

YASNAPP

V.G. Kalinnikov

Data taking

Collaboration
Country or international organization	City	Institute or Laboratory
Armenia	Yerevan	YSU
Belarus	Minsk	NC PHEP BSU
		RINP BSU
Belgium	Leuven	K.U.Leuven
Bulgaria	Sofia	INRNE BAS
		SU
	Plovdiv	UP
Czech Republic	Prague	CTU
	Rez	NRI
Finland	Helsinki	SEFT
	Jyvaskyla	UJ
France	Orsay	CSNSM
		LAL
Germany	Halle	MLU
	Heidelberg	MPI-K
	Mainz	JGU
	Tubingen	EKU
Mongolia	Ulaanbaatar	NUM
Poland	Cracow	NINP
		IP JU
		FPNT UMM
	Lublin	IP MCSU
	Warsaw	SINS
Romania	Bucharest	IFIN - HH
		Univ.
Russia	Gatchina	PNPI RAS
	Voronezh	VSU
	Moscow	SSC RRC KI
		MEPhI
		PFUR
		SSC-ITEP
		SINP MSU
		MSU
		"INTRA"
	Troitsk	INR RAS
	St. Petersburg	KRI
		PSU
		IPTI RAS
	Tomsk	TPU
		HCEI RAS-SD
	Yekaterinburg	IEP RAS-UD
Slovak Republic	Bratislava	CU
Spain	Valencia	UV
Sweden	Uppsala	Univ.
Ukraine	Kiev	INR SC NASU
USA	Durham, NC	Duke Univ.
	Irvine, CA	UCI
	Livermore, CA	LLNL
Uzbekistan	Tashkent	INP UAS
		IAP NUU
		NUU
	Samarkand	SSU

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Investigation of Fundamental Interactions in Nuclei at Low Energies

Investigation of Fundamental Interactions in Nuclei
at Low Energies