| 8. Useful Information |
Density: r(g cm-3) = A(amu) x r(atoms Å-3) x 1.66057 where A is atomic mass and r is density.
Neutron energy:
E[meV], l [Å], n [THz], k[Å-1], L[m], t[m sec], T[° K].
8.2 d-Spacings and Selection Rules for Simple Crystal Systems
all reflections allowed
8.2.2 Face Centred Cubic (fcc)
h, k and l must be all even or all odd
8.2.3 Body Centred Cubic (bcc)
(h+k+l ) must be even
8.2.4 Hexagonal Close Packed (hcp)
allowed
reflections must satisfy l =2n
or h-k-1=3n or h-k-2=3n,
where n is an integer.
8.3 Crystal Structures of some Metallic Elements
| Scandium | Sc | hexagonal | a=3.31Å | c/a=1.594 |
| Titanium | Ti | hexagonal | a=2.95Å | c/a=1.588 |
| Vanadium | V | bcc | a=3.02Å | |
| Chromium | Cr | bcc | a=2.88Å | |
| Manganese | Mn | cubic | a=8.89Å | |
| Iron | Fe | bcc | a=2.87Å | |
| Cobalt | Co | hexagonal | a=2.51Å | c/a=1.622 |
| Nickel | Ni | fcc | a=3.52Å | |
| Copper | Cu | fcc | a=3.61Å | |
| Zinc | Zn | hexagonal | a=2.66Å | c/a=1.856 |
| Yttrium | Y | hexagonal | a=3.65Å | c/a=1.571 |
| Zirconium | Zr | hexagonal | a=3.23Å | c/a=1.593 |
| Niobium | Nb | bcc | a=3.30Å | |
| Molybdenum | Mo | bcc | a=3.15Å | |
| Technetium | Tc | hexagonal | a=2.74Å | c/a=1.604 |
| Ruthenium | Ru | hexagonal | a=2.70Å | c/a=1.584 |
| Rhodium | Rh | fcc | a=3.80Å | |
| Palladium | Pd | fcc | a=3.88Å | |
| Silver | Ag | fcc | a=4.09Å | |
| Cadmium | Cd | hexagonal | a=2.98Å | c/a=1.886 |
| Lanthanum | La | hexagonal | a=3.75Å | c/a=1.619 |
| Hafnium | Hf | hexagonal | a=3.20Å | c/a=1.582 |
| Tantalum | Ta | bcc | a=3.31Å | |
| Tungsten | W | bcc | a=3.16Å | |
| Rhenium | Re | hexagonal | a=2.76Å | c/a=1.615 |
| Osmium | Os | hexagonal | a=2.74Å | c/a=1.579 |
| Iridium | Ir | fcc | a=3.84Å | |
| Platinum | Pt | fcc | a=3.92Å | |
| Gold | Au | fcc | a=4.08Å | |
| Mercury | Hg | rhombohedral | a=2.99Å | a =70.45° |
Table 11 Crystal Structures of some Metallic Elements
Before you leave the cabin, quickly go through the following checklist:
· Interlocks complete
· Shutter open
· Vacuum good (<1 mb - see section 6 for more advice on required pressure values)
· Look at data to check sample in beam and detectors working
· Sample environment running at correct setting
· Dashboard is in ‘Running’ state and shows counts and good frames are updating every 5 seconds
· Command file for automatic update and store running
In the event of any problems with the instrument, computing or sample environment your first point of contact should be your local contact, failing that either Alex Hannon or else Spencer Howells.
RAL extension Home number Alex Hannon 5358 (9)-766043 Spencer Howells 5680 (9)-01635-578507 Alan Soper 5543 (9)-01367-820364 SANDALS 6487 Table 12 Local Contact Phone Numbers
The home numbers can be used in the case of problems in the evening, but please not after 11 o'clock, except for dire emergencies. The Main Control room is manned at all hours and they can also be contacted if you have a problem. If you have queries about accommodation, claims or transport contact the University Liaison Office (ULS) inside working hours.
To dial a RAL office extension from outside RAL 0235 44+extension number
To make an external call from a RAL phone 9+normal number
To use the bleeper, phone 70 and wait for a tone. If it is not engaged dial the bleeper number plus the current extension number, and then wait for a tone again before replacing the receiver.
Other useful numbers:
| Person | Office Phone |
Mobile Phone |
| Jonathan Bones | 5411 |
3265 |
| Duncan Francis | 5411 |
3259 |
| Dennis Abbley | 5455 |
3256 |
| Jim Chauhan | 5341 |
3252 |
| John Dreyer | 5452 |
3247 |
| Mike Yates | 5452 |
3251 |
| Peter Phillips | 6764 |
3260 |
| Richard Down | 6764 |
|
| Robin Humphreys | 6940 |
|
| Trevor Cooper | 6765 |
|
| Hari Shah | 6765 |
|
Table 13 Technical Support Phone Numbers |
||
Main Control Room 6789 Target Control Room 6786 / 6784 Emergency ServicesServices (Fire, ambulance)
2222 Computer Support 3029 University Liaison Office 5592 Table 14 Other Useful Phone Numbers
Before you start your experiment please make sure that:
· You have registered with the University Liaison Office (ULS) in R3, or in the Main Control Room (MCR) if you arrive outside working hours. If you are a new user you will be issued with safety instructions, please read them.
· You have picked up a film badge from the Health Physics Office opposite the MCR.
· You have picked up the sample record sheet from the Data Acquisition Centre (DAC) and that you understand the sample handling instructions. This sheet is to be displayed on the instrument during the experiment.
The full safety instructions are to be found in the literature given out by the ULS. However, the salient points concerning the instrument are summarised here.
· After the experiment the sample should be monitored at its surface. If the radiation is,
- Greater than 75 m Sv (g or b ). The ISIS duty officer (ext. 6789) must be informed to supervise the removal of the sample. Any operation concerning the sample must also be supervised by the duty officer.
- Greater than 10 m Sv. The sample can be removed and stored in the active sample cabinet. However, any operation that requires the sample can to be opened must be done in a glove box.
- Less than 10 m Sv. The sample can be handled normally, using good laboratory practice.
· After the completion of the experiment the sample can and sample should be placed in the active samples cabinet in a suitable container with a copy of the sample record sheet.
· If it is necessary to transport an irradiated sample off-site, documentation must be obtained from the health physics office. Do not take the sample to them, they will come down to the instrument. Preparing the documentation will take some time so ask for this well in advance of departure.
· ISIS conforms to COSSH regulations. Any chemical process or procedure that involves chemicals, must be assessed beforehand by ISIS Safety personnel.
· If you have any safety concerns ask your local contact or ring the Main Control Room.
Please note that all of the times given below are subject to change and that up-to-date information may be obtained by typing INFO INFO FOOD on a computer.
R22 Restaurant Opening Hours
Mon - Fri Sat - Sun Breakfast 7.00 - 8.00 7.00 - 8.00 Lunch 11.45 - 13.45 12.00 - 13.00 Dinner 17.00 - 19.00 18.00 - 19.00 Table 15 Restaurant Opening Hours
R1 coffee lounge (hot drinks and snacks) 9.30 - 11.30 (Monday - Friday) 12.30 - 15.30 (Monday - Friday) R22 coffee lounge 11.45 - 13.45 (Monday - Friday)
Blewbury The Red Lion Chilton Rose and Crown East Hendred The Plough Wheatsheaf East Ilsley The Crown and Horns The Swan Steventon The Cherry Tree Wantage The Lamb The Nelson West Hendred The Hare West Ilsley The Harrow
Last Updated 09 Nov 1998