## Referat and exam by Larisa Korotkova

Moderators: Maxim Khlopov, Konstantin Belotsky

### Re: реферат Коротковой Ларисы

Maxim Yur'evich!
I looked through the text and have't found any corrections. Can you just say, what have You corrected?
It doesn't matter what you write, it matters who is your advisor!

Larisa_MEPhI

Posts: 24
Joined: Mon 27 Sep 2010 20:29
Location: Russia, Moscow

### Re: реферат Коротковой Ларисы

After DAMA explanation I have put a sentence that it relates the signal to formation of anomalous isotopes of sodium. It is necessary for successive discussion of anomalous isotopes in DAMA detector matter.
When you recalculated numerical factors in Ch. 2 for S_2, you have also changed the value of the total mass within the cosmological horizon in the period of OHe creation. For the fixed OHe density the value of this mass, determined by the time of OHe formation is independent on the mass of OHe and thus should not change.
Regards
M.Yu.Khlopov
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]

Maxim Khlopov

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Joined: Sat 9 Aug 2008 19:42
Location: Paris

### an additional question to реферат Коротковой Ларисы

Dear Larisa,
Though your referat is accepted, where still remains a question, which I intend to ask you as an additional during exam.
Please check the numerical factor in the expression for T_od in Ch.2 with the use of the condition of OHe decoupling:
n_B \sigma v (m_p/m_o) t = 1
If you prepare the answer to this question, it would strongly facilitate our discussion at the exam.
Regards
M.Yu.Khlopov
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]

Maxim Khlopov

Posts: 1760
Joined: Sat 9 Aug 2008 19:42
Location: Paris

### Re: реферат Коротковой Ларисы

Да, Максим Юрьевич, я согласна. Виновата. Когда я меняю S_2 на S_3, коэффициент в определении T_od уменьшается почти в 5 раз (с 200 до 43). Считая общую массу, получается, что за счет M_od я умножаю на 100, а за счет T_od делю на 5 в 3 степени. Поэтому порядок величины остается неизменным.
It doesn't matter what you write, it matters who is your advisor!

Larisa_MEPhI

Posts: 24
Joined: Mon 27 Sep 2010 20:29
Location: Russia, Moscow

### Re: реферат Коротковой Ларисы

Dear Larisa,
My question is: can you check the value of T_od (and the numerical factor 43) with the use of the relationship
n_B \sigma v (m_p/m_o) t = 1
from which it was determined. Just put the expressions for n_B, \sigma, v, m_o and t and find T_od
Regards
M.Yu.Khlopov
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]

Maxim Khlopov

Posts: 1760
Joined: Sat 9 Aug 2008 19:42
Location: Paris

### Exam by Larisa Korotkova 2 semester

The record of exam, passed by Larisa Korotkova on 26.04.2011
[i]Хлопов Максим Юрьевич
Maxim Khlopov[/i]

Maxim Khlopov