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П оиск безнейтринного двойного бета-распада 76 Ge . Проект GERDA . Кирпичников И. В. , ИТЭФ PowerPoint PPT Presentation


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П оиск безнейтринного двойного бета-распада 76 Ge . Проект GERDA . Кирпичников И. В. , ИТЭФ. Germany,Italy,Russia, Poland, Belgium, China, Switzerland 95 physicists, 17 institutions Russia: KI, ITEP, INR, JINR. ПРОЕКТ GERDA. Целью проекта GERDA является создание установки

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П оиск безнейтринного двойного бета-распада 76 Ge . Проект GERDA . Кирпичников И. В. , ИТЭФ

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76 ge gerda

-76Ge. GERDA. . .,

Germany,Italy,Russia,

Poland, Belgium, China, Switzerland

95 physicists,

17 institutions

Russia:

KI, ITEP, INR, JINR


76 ge gerda

GERDA

GERDA

- 76Ge.

:

86 % 76Ge . .

2


76 ge gerda

Ge

(Ge-76) =

= (HP Ge)

( 100%)

( ~ 4 )

.

2b2nu-

7.7 % 86 %

Lim T1/2 ~k(Mt / BE)1/2

M , (%%) ,

, (. ),

E , t


76 ge gerda

Detector

Mass, g

HV,V

Status

Enriched

ANG 1

958

3500

Operatig in GERDA

ANG 2

2833

4000

Operating in GERDA

ANG 3

2391

3000

Operating in GERDA

ANG 4

2372

3000

Operating in GERDA

ANG 5

2746

1800

Operating in GERDA

RG 1

2110

4500

Operating in GERDA

RG 2

2166

4000

Operating in GERDA

RG 3

2087

3300

Operating in GERDA

total

17.663

Ge


76 ge gerda

Claim: 4.2 evidence for 0

Best fit: 1.19 x10**25 y

PSA analysis (MPLA21,2006):

- 2001 2b0nu- .

(2.23 + 0.44 0.31)x10**25 y (6)

Ettore Fiorini, TAUP-2005,

Zaragoza, September 12, 2005:


76 ge gerda

GERDA:

I: 17.6 Ge (86% Ge-76)8 H-M IGEX

3 , ~ 10-2cts/(keVkgyr)

( H-M)

2010, Gran Sasso

T1/2 > 3 x 1025 yr <mn> < 270 meV

II: 40 Ge(85% Ge-76)8 H-M IGEX (17.9 )+ (25-30) Ge BEGe.

=10-3 cts/(keVkgyr) T1/2 > 1.5 1026 yr 3

<mn> < 110 meV

6


76 ge gerda

:

4 , h=6

70 ..

.

:

10 , h=~9

630 ..

LNGS,

1400

(3800 )

7


76 ge gerda

Ge-

I GERDA.

10


76 ge gerda

Test.doc

,

.

Ge-76,

%%

.,

GTF45

2.312

7.9

3000

GTF32

2.321

7.9

3000

GTF112

2.957

7.9

3000

7.590

RG1

2.110

85

4500

ANG4

2.372

85

3000

RG2

2.166

85

4000

6.648

2010-2011 . .

,

.


76 ge gerda

2010:

Ar-42.


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position

top

Middle

bottom

R12,gtf

30.68 d

13.02-16.03.11

Norm

gtf45

gtf32

Gtf112

R14,enr

7.1 d

21.08-28.08.11

50 cm high

Rg1

Ang4

Rg2

R15,enr

16.02 d

30.06-25.07.11

Norm

Rg1

Ang4

Rg2

R16, enr

8.9 d

1.08-10.08

Norm

Rg1

Ang4

Rg2

R16, gtf

8.9 d

1.08-10.08

70 cm high

gtf32

gtf45

gtf112

R17 enr

6.0 d

11.08-17.08

Norm

Rg1

Ang4

Rg2

R17 gtf

6.0 d

11.08-17.08

70 cm high

gtf32

gtf45

gtf112

R18 enr

6.0 d

17.08-22.08.11

Norm

Rg1

Ang4

Rg2

R18 gtf

6.0 d

17.08-22.08.11

Norm

gtf32

gtf45

gtf112

R19, enr

2.8 d

25.08-28.08.11

80 cm high

gtf32

gtf45

gtf112

R20, enr

6.7 d

31.08-6.09.11

120 cm high

Rg1

Ang4

Rg2

R20, gtf

6.7 d

31.08-6.09.11

- 25 cm low

gtf32

gtf45

gtf112

R21, enr

13.65 d

5.09-19.09.11

60 cm high

Rg1

Ang4

Rg2

R21, gtf

13.65.d

5.09-19.09.11

- 25 cm low

gtf32

gtf45

gtf112

R22,enr

15.73 d

19.09-16.10.11

- 25 cm low

Rg1

Ang4

Rg2

R22,gtf

15.73 d

19.09-16.10.11

- 25 cm low

gtf32

gtf45

gtf112

2011


76 ge gerda

- (minishroud) : 50 115 45 .

. +(3-4) .


76 ge gerda

-


76 ge gerda

: 79 Ge-76. . .


76 ge gerda

.

2b2nu-


76 ge gerda

-

2b0nu-

( Ge,79 ).


76 ge gerda

.

2037 keV

<1950-2150 keV>

BI=0.045 events/kev kg year

3 (1 )

36.9


76 ge gerda

. . .

2037 k eV

1 200 (1950-2150).

<BI>=0.018/


9 2011

9 2011 .


12 9 2011

(12 ) 9 2011 .

total counts between 1939 and 2139 keV

Detector 0: 1Detector 1: 0Detector 2: 0Detector 3: 0Detector 4: 0Detector 5: 1Detector 6: 0Detector 7: 0Detector 8: 0Detector 9: 1Detector 10: 0

BI ---> 0.012 ev /keV*kg*y

BI ---> 0.018 ev /keV*kg*y

Mass of enriched Ge detectors: 17.671 kg

Mass of natural Ge detectors: 7.59 kg


76 ge gerda

GERDA LArGe-test facility. .


76 ge gerda

2.615 5000. 1- .


76 ge gerda

2- .

1. 37

2. .

3. 2012

( BEGe)


76 ge gerda

1. GERDA 2010 .

2. 2010 .

.

3. Ar-42 (-42) .

2b2nu- Ar-42 (-42) 8%

. .

4. 2b0nu-

0.074 / .

( 0.01-0.02 / ).

5. 1 (8

).

6. 2- :

) 37

) Ge-76

) 2012 (

BEGe)

7.


76 ge gerda

Gerda-EXO

Ge. M=17.6 =100 % B=0.04 E=5 keV

Lim T1/2 = k(Mt / BE)1/2= k (17.61t / 0.045) = 8.4 kt

Xe. M=63 = 0.65 B=0.004 E=200 keV

Lim T1/2 = k(Mt / BE)1/2= k (630.65t / 0.004300) = 4.8 kt


76 ge gerda

Matrix elements


2b0nu

2b0nu-?


Klapdor data

Klapdor data


76 ge gerda

?

Lim T1/2 = k(Mt / BE)1/2

M , ,

, ( / ), E , t


76 ge gerda

GERDA

GERDA - 76Ge.

(20-) . , .

, . , .

34


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