Notice: Payments for answers will end 4/10/2017. Click for more info.
You have new items in your feed. Click to view.
Question and answer
Q: How many neutrons are in Cesium-130 (Cs)? A.55 B.75 C.130 D.185
A: Cross sections for formation of cesium and rubidium isotopes produced by bombardment of uranium with protons ranging in energy from 0.1 to 6.2 Bev were measured both radiochemically and mass spectrometrically. [ Independent yields were determined for Rb/sup 84/, Rb/sup 86/, Cs/sup 127/, Sc, su p 129/. Cs/sup 130/, Cs/sup 131/, Cs/sup 132/, Cs/sup 134/, Cs/sup 136/, and, at some e nergies, Rb/sup
83 and Cs/sup 135/. In addition, the independent yield of Ba/sup 131/ and the chain yields of Cs/sup 125/, Cs/sup 127/, Cs/sup 129/, La/sup 131/, Cs/sup 135/, Cs/sup 137/, ion cross sections of the Cs and Ba products on the neutron- excess side of stability decrease monotonically with increasing energy above 0.1 Bev, whereas the excitation functions for independent formation of the more neutron-deficient products in the Cs-Ba region and of Rb/sup 84/ and Rb/sup 86/ all go through maxima. The proton energies at which these maxima occur fall on a smooth curve when plotted against the neutronproton ratio of the product, with the peaks moving to higher energies with decreasing neutron-proton ratio. Under the assumption that the mass-yield curve in the region 125 < A < 140 is rather flat at each proton energy, the crosssection data in the Cs region can be used to deduce the charge dispersion in this mass range. Plots of log sigma vs N/Z (or Z--Z/sub A/) show symmetrical bell-shaped peaks up to a bombarding energy of 0.38 Bev, with full width at halfmaximum increasing from 3.3 Z units at 0.10 Bev to about 5 Z units at 0.38 Bev, and with the peak position (Z/sub p/) moving from Z/ sub A/ -- 1.44 to Z/sub A/ -- 0.85 over the same energy range. At all higher energies, a double-peaked charge distribution was found, with a neutron-excess peak centered at N/Z approximates 1,515(Z/sub p/ approximates Z/sub A/ -- 1.9), and having approximately constant width and height at bombarding energies greater than 1 Bev. The peak on the neutron-deficient side which first becomes noticeable at 0.68 Bev appears to become broader and shift slightiy to smaller N/ Z values with increasing energy, The two peaks are of comparable height in the Bev region, and the peak-to-valley ratio is only approximates 2. ]
Expert answered|plain_whyt|Points 2301|
Question
Asked 8/30/2011 6:03:12 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
26,914,226 questions answered
*
Get answers from Weegy and a team of really smart lives experts.
Popular Conversations
Phototropism
Weegy: Geotropism is the growth response of a plant in response to gravity. User: Which type of plant was the last to ...
5/16/2018 8:45:28 AM| 2 Answers
2. Which of the following is not an example of a nontraditional ...
Weegy: Law firm is not an example of a nontraditional health information technology setting. User: 3. Good coding ...
5/16/2018 10:46:59 AM| 2 Answers
Given the formula E = IR what is the formula for R? A. ...
Weegy: Given the formula E = IR, the formula for R is R = E/I. User: Solve this equation: 80 = 3y + 2y + 4 + 1. ...
5/16/2018 11:47:29 AM| 2 Answers
6 + (2 + 3) × 5?
Weegy: 2*6+4*5, 12 + 20 = 32 User: 2(5 × 3) + 2(5 × 8) + 2(3 × 8) Weegy: 3/8+2/5 = 15/40+16/40 = 31/40 User: ...
5/22/2018 9:36:32 AM| 2 Answers
After the skin is cut and a capillary wall breaks, what's the first ...
Weegy: After the skin is cut and a capillary wall breaks, the first step in working to form a clot is - Platelets clump ...
5/23/2018 5:14:16 PM| 2 Answers
What does velocity mean
5/23/2018 7:13:12 PM| 2 Answers
S
R
L
R
P
R
Points 216 [Total 658] Ratings 0 Comments 26 Invitations 19 Offline
S
L
Points 207 [Total 218] Ratings 0 Comments 207 Invitations 0 Offline
S
L
Points 120 [Total 120] Ratings 0 Comments 20 Invitations 10 Offline
S
1
L
L
P
R
P
L
P
P
R
P
R
P
R
P
Points 113 [Total 13198] Ratings 0 Comments 103 Invitations 1 Offline
S
Points 30 [Total 30] Ratings 0 Comments 0 Invitations 3 Offline
S
Points 14 [Total 14] Ratings 0 Comments 14 Invitations 0 Offline
S
Points 13 [Total 13] Ratings 0 Comments 3 Invitations 1 Offline
S
Points 13 [Total 13] Ratings 0 Comments 13 Invitations 0 Offline
S
Points 11 [Total 11] Ratings 1 Comments 1 Invitations 0 Offline
S
L
1
R
Points 11 [Total 1416] Ratings 0 Comments 1 Invitations 1 Offline
* Excludes moderators and previous
winners (Include)
Home | Contact | Blog | About | Terms | Privacy | © Purple Inc.