ps7 - Assignment #7 PHYSICS 8.284 Due 11:04 am MONDAY 10...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Assignment #7 PHYSICS 8.284 Due 11:04 am MONDAY 10 April 2006 Reading: Clayton § 4.3 through equation (4-62). Hansen Kawaler 6.3-5; Bohm- §§ Vitense, Volume 2, Chapters 5 (Eddington-Barbier), 6 (Temperature Stratification) and 10 (Line Formation) as nedeed. 1. The solar neutrinos observed in the Homestake Mine experiment came from the PP III branch of the proton-proton chain. The limiting reaction is Be 7 + p B 8 + θ which is followed almost immediately by the emission of a positron and a neutrino. a) Take the central temperature of the Sun to be 1 . 5 × 10 7 K, so that kT = 1 . 293 kev. Calculate by how much (expressed as a percent or as a factor) the cen- tral temperature must drop to cause the rate of PP III neutrinos to drop by a factor of 3, which is the observed shortfall. Hint: Calculate the derivative of the natural log of the rate with respect to temperature and find the dT which changes the log of the rate by an appropriate amount. b)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/26/2012 for the course PHYS 8.284 taught by Professor Rappaport during the Spring '06 term at MIT.

Page1 / 2

ps7 - Assignment #7 PHYSICS 8.284 Due 11:04 am MONDAY 10...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online